PayPal sucks because if they determine funds where used for illegal activity they delete your account and you forfeit the funds on the account.
Originally Posted by rockerrick
It's worse than that. If PayPal is suspicious about anything about your account, they can freeze your funds and take up to 6 months to investigate. Many people have claimed they do this capriciously with little explanation. They are alleged to have frozen people's account and refused to give any information about it for up to 6 months before making a decision.
They will only pay by electronic funds transfer. As with most forms of EFT, they can reverse the transfer for some time in the future with no advance notice.
If you do accept PayPal for ANYTHING, be sure to regard any PayPal money as being "phantom" money that can vanish at any time. Transfer the money to a real bank and then withdraw the funds, preferably as cash. You might even want to be sure that you don't have any other accounts at the bank account that you use for PayPal.
Google for PayPal horror stories. Also read the PayPal user agreement for what they're allowed to do.
Be similarly careful with square. Be sure it's not linked to any bank or bank account that you have significant funds in, and be sure to drain it frequently.