As an Android user, I've paid for two, maybe three? apps. And got a refund on one because the paid version didn't do what I thought it said it did.
The restrictions on non-Google billing did impact my employer, but it was less of a problem in the US as in some other countries where Google only billing meant we couldn't charge users as very few had Google compatible payment methods and Google wouldn't let us use other providers that could accept money with the payment methods people actually had. We had other methods in our apk download, but I recall having to take those out, too.
Of course, Apple made payment go through them, but most Apple can accept payments from most of their users, and a lot of their users have a payment method on file.
The restrictions on non-Google billing did impact my employer, but it was less of a problem in the US as in some other countries where Google only billing meant we couldn't charge users as very few had Google compatible payment methods and Google wouldn't let us use other providers that could accept money with the payment methods people actually had. We had other methods in our apk download, but I recall having to take those out, too.
Of course, Apple made payment go through them, but most Apple can accept payments from most of their users, and a lot of their users have a payment method on file.