I looked into Stripe recently. Unless I mis-understand the technology, it's an API, and an Application Programming Interface requires Application Programming. In other words, I would need to operate a website, physically or in the cloud, and create the program that generates credit card transactions. I would also have to manage all of the policies that PayPal covers for me, such as dispute resolution.
PayPal gives me access to USPS first class mail shipping, which USPS doesn't even offer via their own website. This saves me money on shipping costs.
Last time I looked, Amazon seemed more complicated, and oriented towards bigger businesses than mine. I don't remember what I concluded about WePay and Square.
Everything is great until it isn't -- kind of a corollary to survivorship bias I guess.
