0.6/0.1/0.3 (which actually doesn't make any sence!) means
someone pays you 60 cents to join the program, 10 cents for every first level referrals you get and 30 cents for every second level referrals you get (meaning those referrals your direct referrals make in the program)
no one would offer you 20 more for 2nd level refs than 1st level refs so it would be rather weird to see an offer like the example, but anyways that's how it goes!
Hope this helps you!

P.S. If you're thinking about going to the referral exchange please do read the rules first since you're not quite eligible to participate yet. One needs to have been a member in this forum for 2 weeks and posted 20 worthwile posts before participating!