Wouldn’t ARR specifically mean subscription type products like you list? Payment processing isn’t annually recurring as I understand it.
Maybe if you're being pedantic but let's assume they generate $1B to $3B in payments revenue on top of that non payments ARR. I don't see why you'd assume the former isn't likely to grow and so you might as well think of it as recurring. It's just low margin.
Still a rich multiple at 40-70x
In this case they reported Stripe's annual run rate — a metric that's roughly comparable to annual recurring revenue, but for non-recurring business models.