This is what i saw on the EA forums
"Dear user,
Thank you for your inquiry.
There have been fraud attempts and until resolved EA took the SponsorPay offerwall down.
We hope to be back up and running soon.
Best regards,
Armando
SponsorPay Support Team
- -
SponsorPay -
"
and here is the answer with what means fraud
Sponsorpay make their money by providing accurate and targetted information to the companies linked with the offers. If people are making up answers or changing their locations to get more offers then the companies are going to end up with inaccurate or irrelevant information which they aren't going to continue to pay for.