I've setup PPMs with two girls who wanted to skip the M&G, neither of them turned up to the hotel.
Both said they were on their way, both sent videos or photos to prove they're real.
If a SB won't go to a M&G, or she wants to be paid, it's a great way of weeding out time wasters and flakes.
If they won't do an unpaid M&G then just "next" them. Block and move on.
(I did see one young lady & skipped the M&G , she turned out to be good.... until she started hitting me up for money out of the blue.)