I was going to say something similar, PayPal is very pussy when it comes to anything that's not whitebread, even though I'm sure the term "white" probably makes them piss their panties. Many, if not all of the events I used to attend over the years have dropped them as a payment processor because they simply can't take the risk of one of the controversial or outspoken panels being declared "against the TOS" and having their account frozen.