Theory on why so many photos.
To make it look like there's more girls than there really is. They use generic descriptions so multiple girls can use the same picture to meet your time slot. For example if the real one is busy and it's your first time with the agency they let you use some one else in place of the real person. They can book one girl for the same hour for 3 dudes and send them to 3 different girls. Which why most reviews always say "similar to photos" haha perhaps they keep track of your phone number and if you're a repeat they make sure you get with the same person again the only way to know who's who is by visiting them all yourself to see. Imagine if for 30 pictures only 15 ladies to fulfill the demand.