Well, options are as the name says ... optional. I just checked the roster and there is exactly one girl offering anal fisting and it's listed as being in training. I have actually never seen different for that option.
AF and vaginal fisting are also often listed as being in training (if available).
Cheap is obviously a subjective term, but the shop isn't cheap overall.
To each there own. I personally have no interest in either way of fisting, but girls practicing that are usually not too concerned about size