Why, what is the play here? I know PayPal is used extensively in some countries (like Brazil?) but in most countries there are other/local services that have substantial market share and I do not think that PayPal can compete.
If I'm buying something from a website and they don't offer Apple Pay, I'll opt for PayPal instead since I already have my credit/debit cards saved there and don't want to hand over numbers to a random website. Also, when I used to do more freelancing, all of my clients preferred to be invoiced and pay through PayPal (who skimmed a decent chunk of change off the top).
Not sure if either of those reasons would be what Stripe wants here, but just my two cents. I'm American fwiw.
Interesting that you'd mention Brazil. I consider it one of the very few examples of countries successfully replacing PayPal with a publicly owned service. Pix is ubiquitous in Brazil and has been for years. It has not only displaced PayPal but also cash and (in large parts) Visa/MasterCard, even in the face of US tariff threats.
Consolidation (move toward making Stripe the only game in town).
Don't forget Venmo - PayPal smartly gobbled that up many, many years ago, and it has a great amount of mindshare (though I don't know how profitable it is). Zelle popped up later and somehow has plenty of users, but unlike Venmo, Zelle is a steaming pile of sh*t of user experience, due to it being a consortium of all the famously-tech-backwards big banks, which stood it up out of fear and jealousy that those "Internet" guys might find a way to disintermediate them somehow.