Now that's just plain wrong. Every privately owned business is free to sell or not sell a service or product, provided they abide the corresponding laws.
I work in the publishing business. The main topic of the journal we produce is human powered mobility. The fact that we don't publish articles about Porsche's newest version of the Cayenne has nothing to do with wanting to convert anyone to our ideas of how traffic in modern cities should work, but it has a lot to do with what we chose to write about.
And in that choice we are (almost) completely free.
Paypal has this choice, too, of course. They also have to take into account that people won't like their decision, which apparently they didn't.