Paypal also came out and said they will no longer refund seller fees when a customer is refunded. Before, they used to just keep the $0.30, but now they will keep the 2.9% as well. More the reason to switch to a new processor like Stripe.
For a lot of merchants it's not a matter of switching to Stripe.
It's using Stripe but also including PayPal as an option because a huge percentage of buyers want to use it to pay for things -- especially 1 time purchases of digital goods.
About 40% of my course sales are through PayPal.
By the way if anyone reading is curious, that new PayPal refund policy goes into effect October 11th 2019 (you probably got the User Agreement email to notify you of this too if you're a merchant).
> Stripe supports the ability to refund charges made to your account, either in whole or in part. If the original charge underwent currency conversion, the refunded amount is converted back using the same process. There are no fees to refund a charge, but the fees from the original charge are not returned.