Actually now that I look at it again, the profile doesn't say the photos are verified, so...
It's her most expensive extra at 150. Needs to be with condom too.
I get it that some girls don't like fingering, esp when the punter hasn't cut his nails, is dirty or too rough. Maybe she advertises it as an outrageous extra so that she can say no to finerging in a roundabout way.