There's plenty of other payment sites/apps available. (CashApp, Ko-fi, personal websites that accept crypto-currency etc.) You just have to explain that to them (the person you're seeking a commission/product from), and ask for their alternative options. (Smart artists/creators will likely have those options.)

You can also have them send you a money order through your email (using their paypal). And you can send them a payment that way, w/o using an account yourself.