In 3 years a lot of companies have changed names thru merging or just quitting I do not know all of the names. And in my area, it is a lot less money coming in now. that might be because I do not work that hard because of medical problems. I took most of last month off. Only done 4 shops. 2 Pizza shops for $25 each and 2 grocery store shops and I messed one of those up.
Overall, mystery shopping seems to be about the same today as it was in 2015, except that the tech aids have improved and job fees have increased on some high end shops. You should have no trouble getting right back into the groove.