When I had my online shop. I dealt a lot with Paypal. Dealing with Paypal and their Dispute system was a pain in the ***. I had one customer who signed for is package. Then told Paypal he never got it. The guy was posting pictures of the items I sold him on the Forum I was a Vendor on. So I had pictures of the items he posted and his signature...He kept doing a Charge back.. I would win the dispute and paypal would give my money back. Then he would file a Charge back again and again Paypal would pull my funds and freeze them. This guy did these 5 times before he gave up. I just had to keep fighting each time he did it. Paypal just let him do it over and over. I kept a 100% positive feedback for 7yrs as a Vendor and had 100k+ roll through Paypal each year and Paypal showed me how shady they really are over that course.
Some day Paypal will be no more or will be bought out. Till that day we don't have much of a choice many times, but to still use them.