There's loads that charge extra for OWO and RO, just because you haven't seen any that do doesn't mean it doesn't go on.
I was just pointing out that it is far from being standard, as implied by the previous poster. While RO is not my thing, OWO very definitely is, and in many decades of punting in various areas of the country, not once that I can recall have I ever been asked to pay extra for it. None of the agencies that I am aware of, who increasingly seem to be allowing their girls to charge extra for things like cim, for example, yet put owo as an extra.
I have known many who won't do owo, who will only do ow, but that is a different thing to charging extra for doing it without. I am assuming that it is the cheap-end Roms, who have the reputation for charging extra for just about everything, doing this? If so, it would explain why I have never come across it, as I have long given them a wide berth. God forbid it should ever become standard practice. Next they will be asking extra to fuck.
I have been asked to pay extra for kissing, but that was abroad. Again, in this country it is either something a girl either does, or she doesn't. And kissing is as good a way of catching something.