I don't even read anything that starts at less than $10. It's not worth my time.
You need to read the guidelines, go at a specific time, order within the guidelines and then write a report. I suppose it's a fine deal if you have nothing better to do or if you see this as a hobby. You aren't going to make any money doing $8 shops.
There is a reimbursement only (very large company) that generally offers no "fee" and then a "bonus" of $5 to $10 at the end of the month. The problem is that by the end of the month, I am getting $75 (up from $50) to do the same types of shops. I'm not sure when I will ever do their dining shops again.