143lovemail...seems to be a relatively new site, has a calculator to tell you how much you can earn...here's what they say you can earn if you refer just two people and read one email per month:
Level: 0 Members: 1 $0.01
Level: 1 Members: 2 $0.006
Level: 2 Members: 4 $0.004
Level: 3 Members: 8 $0.004
Level: 4 Members: 16 $0.0016
Level: 5 Members: 32 $0.0032
Level: 6 Members: 64 $0.0064
Level: 7 Members: 128 $0.0128
Level: 8 Members: 256 $0.0256
Level: 9 Members: 512 $0.0512
Level: 10 Members: 1024 $0.1024
Level: 11 Members: 2048 $0.2048
Level: 12 Members: 4096 $0.4096
Level: 13 Members: 8192 $0.8192
Level: 14 Members: 16384 $1.6384
Level: 15 Members: 32768 $3.2768
Level: 16 Members: 65536 $6.5536
Level: 17 Members: 131072 $13.1072
Level: 18 Members: 262144 $26.2144
Level: 19 Members: 524288 $52.4288
Level: 20 Members: 1048576 $104.8576
Level: 21 Members: 2097152 $209.7152
Level: 22 Members: 4194304 $419.4304
Level: 23 Members: 8388608 $838.8608
Level: 24 Members: 16777216 $1677.7216
Level: 25 Members: 33554432 $3355.4432
Level: 26 Members: 67108864 $6710.8864
Level: 27 Members: 134217728 $13421.7728
Level: 28 Members: 268435456 $26843.5456
Level: 29 Members: 536870912 $53687.0912
Level: 30 Members: 1073741824 $107374.1824
Level: 31 Members: 2147483648 $214748.3648
Level: 32 Members: 4294967296 $429496.7296
Level: 33 Members: 8589934592 $858993.4592
Level: 34 Members: 17179869184 $1717986.9184
Level: 35 Members: 34359738368 $3435973.8368
Level: 36 Members: 68719476736 $6871947.6736
Level: 37 Members: 137438953472 $13743895.3472
Level: 38 Members: 274877906944 $27487790.6944
Level: 39 Members: 549755813888 $54975581.3888
Level: 40 Members: 1099511627776 $109951162.7776
Level: 41 Members: 2199023255552 $219902325.5552
Level: 42 Members: 4398046511104 $439804651.1104
Level: 43 Members: 8796093022208 $879609302.2208
Level: 44 Members: 17592186044416 $175921860.44416
Level: 45 Members: 35184372088832 $351843720.88832
Level: 46 Members: 70368744177664 $703687441.77664
Level: 47 Members: 140737488355328 $1407374883.55328
Level: 48 Members: 281474976710656 $2814749767.10656
Level: 49 Members: 562949953421312 $5629499534.21312
Level: 50 Members: 1.12589990684262E+15 $11258999068.4262
Level: 51 Members: 2.25179981368525E+15 $22517998136.8525
Level: 52 Members: 4.5035996273705E+15 $45035996273.705
Level: 53 Members: 9.00719925474099E+15 $90071992547.4099
Level: 54 Members: 1.8014398509482E+16 $180143985094.82
Level: 55 Members: 3.6028797018964E+16 $360287970189.64
Level: 56 Members: 7.20575940379279E+16 $720575940379.279
Level: 57 Members: 1.44115188075856E+17 $1441151880758.56
Level: 58 Members: 2.88230376151712E+17 $2882303761517.12
Level: 59 Members: 5.76460752303423E+17 $5764607523034.24
Level: 60 Members: 1.15292150460685E+18 $11529215046068.5
Level: 61 Members: 2.30584300921369E+18 $23058430092136.9
Level: 62 Members: 4.61168601842739E+18 $46116860184273.9
Level: 63 Members: 9.22337203685478E+18 $92233720368547.8
Level: 64 Members: 1.84467440737096E+19 $184467440737096
Level: 65 Members: 3.68934881474191E+19 $368934881474191
Level: 66 Members: 7.37869762948382E+19 $737869762948382
Level: 67 Members: 1.47573952589676E+20 $1.47573952589676E+15
Level: 68 Members: 2.95147905179353E+20 $2.95147905179353E+15
Level: 69 Members: 5.90295810358706E+20 $5.90295810358706E+15
Level: 70 Members: 1.18059162071741E+21 $1.18059162071741E+16
Level: 71 Members: 2.36118324143482E+21 $2.36118324143482E+16
Level: 72 Members: 4.72236648286965E+21 $4.72236648286965E+16
Level: 73 Members: 9.44473296573929E+21 $9.44473296573929E+16
Level: 74 Members: 1.88894659314786E+22 $1.88894659314786E+17
Level: 75 Members: 3.77789318629572E+22 $3.77789318629572E+17
Level: 76 Members: 7.55578637259143E+22 $7.55578637259143E+17
Level: 77 Members: 1.51115727451829E+23 $1.51115727451829E+18
Level: 78 Members: 3.02231454903657E+23 $3.02231454903657E+18
Level: 79 Members: 6.04462909807315E+23 $6.04462909807315E+18
Level: 80 Members: 1.20892581961463E+24 $1.20892581961463E+19
Level: 81 Members: 2.41785163922926E+24 $2.41785163922926E+19
Level: 82 Members: 4.83570327845852E+24 $4.83570327845852E+19
Level: 83 Members: 9.67140655691703E+24 $9.67140655691703E+19
Level: 84 Members: 1.93428131138341E+25 $1.93428131138341E+20
Level: 85 Members: 3.86856262276681E+25 $3.86856262276681E+20
Level: 86 Members: 7.73712524553363E+25 $7.73712524553363E+20
Level: 87 Members: 1.54742504910673E+26 $1.54742504910673E+21
Level: 88 Members: 3.09485009821345E+26 $3.09485009821345E+21
Level: 89 Members: 6.1897001964269E+26 $6.1897001964269E+21
Level: 90 Members: 1.23794003928538E+27 $1.23794003928538E+22
Level: 91 Members: 2.47588007857076E+27 $2.47588007857076E+22
Level: 92 Members: 4.95176015714152E+27 $4.95176015714152E+22
Level: 93 Members: 9.90352031428304E+27 $9.90352031428304E+22
Level: 94 Members: 1.98070406285661E+28 $1.98070406285661E+23
Level: 95 Members: 3.96140812571322E+28 $3.96140812571322E+23
Level: 96 Members: 7.92281625142643E+28 $7.92281625142643E+23
Level: 97 Members: 1.58456325028529E+29 $1.58456325028529E+24
Level: 98 Members: 3.16912650057057E+29 $3.16912650057057E+24
Level: 99 Members: 6.33825300114115E+29 $6.33825300114115E+24
Level: 100 Members: 1.26765060022823E+30 $1.26765060022823E+25
Level: 101 Members: 2.53530120045646E+30 $2.53530120045646E+25
Level: 102 Members: 5.07060240091292E+30 $5.07060240091292E+25
Level: 103 Members: 1.01412048018258E+31 $1.01412048018258E+26
Level: 104 Members: 2.02824096036517E+31 $2.02824096036517E+26
Level: 105 Members: 4.05648192073033E+31 $4.05648192073033E+26
Level: 106 Members: 8.11296384146067E+31 $8.11296384146067E+26
Level: 107 Members: 1.62259276829213E+32 $1.62259276829213E+27
Level: 108 Members: 3.24518553658427E+32 $3.24518553658427E+27
Level: 109 Members: 6.49037107316853E+32 $6.49037107316854E+27
Level: 110 Members: 1.29807421463371E+33 $1.29807421463371E+28
Level: 111 Members: 2.59614842926741E+33 $2.59614842926741E+28
Level: 112 Members: 5.19229685853483E+33 $5.19229685853483E+28
Level: 113 Members: 1.03845937170697E+34 $1.03845937170697E+29
Level: 114 Members: 2.07691874341393E+34 $2.07691874341393E+29
Level: 115 Members: 4.15383748682786E+34 $4.15383748682786E+29
Level: 116 Members: 8.30767497365572E+34 $8.30767497365572E+29
Level: 117 Members: 1.66153499473114E+35 $1.66153499473114E+30
Level: 118 Members: 3.32306998946229E+35 $3.32306998946229E+30
Level: 119 Members: 6.64613997892458E+35 $6.64613997892458E+30
Level: 120 Members: 1.32922799578492E+36 $1.32922799578492E+31
Level: 121 Members: 2.65845599156983E+36 $2.65845599156983E+31
Level: 122 Members: 5.31691198313966E+36 $5.31691198313966E+31
Level: 123 Members: 1.06338239662793E+37 $1.06338239662793E+32
Level: 124 Members: 2.12676479325587E+37 $2.12676479325587E+32
Level: 125 Members: 4.25352958651173E+37 $4.25352958651173E+32
Level: 126 Members: 8.50705917302346E+37 $8.50705917302346E+32
Level: 127 Members: 1.70141183460469E+38 $1.70141183460469E+33
Level: 128 Members: 3.40282366920938E+38 $3.40282366920938E+33
Level: 129 Members: 6.80564733841877E+38 $6.80564733841877E+33
Level: 130 Members: 1.36112946768375E+39 $1.36112946768375E+34
Level: 131 Members: 2.72225893536751E+39 $2.72225893536751E+34
Level: 132 Members: 5.44451787073502E+39 $5.44451787073502E+34
Level: 133 Members: 1.088903574147E+40 $1.088903574147E+35
Level: 134 Members: 2.17780714829401E+40 $2.17780714829401E+35
Level: 135 Members: 4.35561429658801E+40 $4.35561429658801E+35
Level: 136 Members: 8.71122859317602E+40 $8.71122859317603E+35
Level: 137 Members: 1.7422457186352E+41 $1.74224571863521E+36
Level: 138 Members: 3.48449143727041E+41 $3.48449143727041E+36
Level: 139 Members: 6.96898287454082E+41 $6.96898287454082E+36
Level: 140 Members: 1.39379657490816E+42 $1.39379657490816E+37
Level: 141 Members: 2.78759314981633E+42 $2.78759314981633E+37
Level: 142 Members: 5.57518629963266E+42 $5.57518629963266E+37
Level: 143 Members: 1.11503725992653E+43 $1.11503725992653E+38
Anybody know where we, the human race are keeping those extra seven or eight gazillion people? We just hit 6 billion last year, people...I don't think the census is THAT far off!!!!