I am curious too. Everyone needs to be very cautious with them.
I was scheduled for two fine dining shops next week with up to $300 and $600 out of pocket. I was assigned the shops in August and very carefully read all of the guidelines because that is real money at stake. Last night I went back to review everything and they had made MAJOR changes to the guidelines and I was no longer eligible for the shops. I had to make a reservation with a deposit that was non-refundable if I canceled within 24 hours. If I had waited until the day before the first dinner to review everything again I would have been out $50, or worse yet what if I hadn't read them again? I emailed and of course they denied making the changes??!!
This is not the first time I have discovered guideline changes after the fact with them, and I have only done 4 shops for them so far!!
It is important to screenshot everything with them as soon as a shop is assigned!