They've ripped me off a few times and I've shrugged it off. The last time they mostly pissed me off with their denial. I filed my BBB complaint along with over 750 others. Tapjoy has a history of denying credits and has been reprimanded by the FTC in the following complaint. The FTC ordered them 20 years of compliance to their ruling.
https://www.ftc.gov/legal-library/browse/cases-proceedings/172-3092-tapjoy-inc-matter#:~:text=Case%20Summary,users%20for%20completing%20advertising%20offers.
When you follow all their directions, and they still deny your credit claim, then use this link to file a complaint with BBB. https://www.bbb.org/us/ca/san-francisco/profile/mobile-advertising/tapjoy-1116-303589