i donated through g2a, paypal blocked the payment, g2a then blocked the payment, and locked my account, ive been banned for 1 month with 5 support tickets with 0 replies on them, and all those methods you just said are "THROUGH" g2a website. even those that you don't need g2a ID to purchase through -> aka regular paypal/mastercard/visa -> you still process through their webpage, which means if you ever had any problems with them your account ends up being locked and get the "User banned" error.
here is a link where you can see of alot of more people having the same prob with their support. they are idiots.