Prima 60+ rake back legitamacy?

[beboppoker]

Dennison (10 posts) has messaged with a 64% rakeback, havent seen link to website.

Quadkiller (9 posts) has sent me a PM with 65% rakeback, *link removed* gives 65% on prima, the FAQ on this site does not work.

Everyone is saying theyre getting about 50% rakeback at prima and these recent 60+% offers have been popping up. I dont mean to discredit anyone as these maybe legitimate but i am worried with the VERY small number of posts these two have.

can anyone determine if their legit?