Share 'somebody please set this straight for me.'

i was told that once u accepted cash u were ineligible to play am events such as bowling green am championships, am nats, and am worlds. but ive also been told that if u accept cash u are eligible to play these events as long as ur rating is below 970. i want to kno exactly how this works. plz somebody set this straight for me! it would be greatly apreciated.