I have 2 referrals that I introduced to the site, both are good friends of mine. I received $6 in referral bonuses ($2 for email confirmation, and $4 for completing their first offers) then I get an email a few days later saying the bonuses will be revoked from my account because they did not follow the terms of agreements. Both friends say they have been using the site regularly and have not lied about personal information.
When I went back to look at the terms and conditions it says that users cannot share an internet connection. I took this to mean you could not invite people in your same household, such as my roommates who are constantly using the same internet as me. I didn't realize even a few instances would cause the referral to be revoked