AA - lower their max hour, delay activation of promised countries
Cashsurfers - lower the payment of non-US members
Spedia - change the pay structure from 25% single level to 5% over 5 level
PaidforSurf - never know how their AVR are related to their payment
mValue - we no longer get paid to surf the web
Multikredits - use to allow international members but now kicking non-US members away. I lost $50 during this process
and .........
This GPTS is an insecure business. Some of us probably put a lot of effort in getting referrals. But at the end, they change the rules of the game in order to pay less.

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Get Paid Directory - The Open Directory Project of Get Paid Programs
Get Paid Watch - The Get Paid to Surf Portal