Looking at payments for Pinboard for this year, it's about a 50/50 split between Stripe and PayPal. Integration with the latter is painful and unpleasant compared to Stripe, but there are a lot of users (international users especially) for whom Stripe is not an option.

I also like not having a single payment provider have the ability to cut off my revenue if some kind of issue arises. For that reason I would avoid integrating PayPal via Stripe even if that option were offered.