First, welcome to the forums!
Most MSCs post shops early in the month, so you may have missed a lot of shops. However, 10 MSCs does not scratch the surface of the 250+ MSCs in the US. You would do well to visit the New Mystery Shoppers area of the forums and read, read read the top topics. Then set up a routine of adding 5 to 10 more companies a day on any day that you do not have a shop scheduled. When you get to 75-100 MSCs you will begin to see much more variety. Remember, each MSC may have from 1 to maybe as many as 10 client. And some clients split theiraccounts among MSCs, usually by region of the country. So you need to rgister with many, many MSCs before you will start to see some trypes of shops.
BTW, retail shops are often on the low end of the pay scale, and you seldom get to keep the merchandise or get anywhere near the cost in reimbursement.
As for "self-assign".... many MSCs require that you complete a certain number of their shops, at a high level of performance, before you will attain "self-assign" status. Just be patient and do several more shops for each MSC and within a couple of months you will start getting shop offers via email, and some self-assign options. It takes some real work to get your MS business up and running!
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.