First mind share. If you are a developer and you want payments, currently you think Stripe. Second, ease of use reputation. Paypal is not known to be easy to i

First mind share. If you are a developer and you want payments, currently you think Stripe. Second, ease of use reputation. Paypal is not known to be easy to integrate with and use. Third, reputation in general. Paypal has a history and reputation (whether deserved or not) of freezing your accounts and leaving you in the worst situation etc.