It's probably that you have done your allotment of shops for that particular client/location. I am one of the few shoppers in my area that does the burger shops so I end up doing them once a week or more sometimes and then I'm done until the next cycle. After a certain amount, you aren't given the option for that location again. Expand your search area and see if they come up somewhere else. You may have also answered one of the screening questions wrong and you're out for the cycle, too. Happened to me when I first started doing the grocery one and clicked yes instead of no and I was out for that shopping period.
Shopping the South Jersey Shore
Naming both the MSC and their client is contrary to Forum rules and is usually also a violation of the ICA. You are welcome to delete the client's name and repost,