Avoid it. The main reason is that I don’t want my credit card/real info associated with adult work in any way.
You might also be surprised at what you get if you ask the Sex Worker nicely. If you’re polite and appear genuine, which I always am, they’ll often be happy to send one or two additional pictures or give you access to the private gallery.
Failing that I have in the past told Sex Workers who won’t, for example, show me a face picture, that I’ll have to judge on meeting and will walk if I’m not attracted. I think that’s fair enough. Doesn’t stop your time being wasted mind!