This was my first company and first shop I did as a mystery shopper many years ago. I have done many of these as a timeshare owner. I have not done the hotel/timeshare shops for non-owners. There are about 4-5 different types of timeshare shops with this company.
Owners get a fee to help reimburse for using your points for the reservation. You have to record the timeshare presentation. Some of these can go on for well over an hour (even if you are good at getting out without it sucking up a half day). There is a mileage reimbursement (or airfare). You get a $50 fee if your recording is good. You might get some parking reimbursed, as well. I usually get $413-500 or so for a shop if I have used my points to make a reservation. You usually get a "free" breakfast or lunch at the presentation and you can be gifted an AMEX or restaurant giftcard or event tickets. You get to keep these.
You also have to fill out a fairly extensive report on the entire resort.
You aren't going to get Hawaii or the Caribbean if you are a new shopper with them. There is a long rotation for doing "same brand" timeshares. I haven't done the one that I don't own yet.
My advice to anyone who is interested in buying a timeshare is to NOT buy from the developer/company. Buy resale and save yourself a lot of money. I love my timeshares. However, the sales department REALLY does need to be mystery shopped!