You can get out of Mystery Shopping what you put into it. I work full time and just shop on the side. I have earned almost $9K this year (not including expenses for which I have been reimbursed.). I've been doing this for about two years and do put some effort into it. There are folks who make a modest living doing this full time.
MF, I know you are a FT teacher, HS math, right? But I can't imagine having the time and energy to 'put' that much effort into doing all that you do. But I guess that is why you are a teacher, and I would imagine a very good one, adapting quickly, uber organized, etc. I wish I had your focus and stamina. The video part makes a big difference though, I am sure. I may check out Ellis as you recommended previously.
Have a wonderful evening.
lol - unplugging the camera is one worry. I find that simply turning it on is a problem!
Unlike filming (I've worked in video production) it's not easy to see the camera 'on' light without being conspicuous.
Plus, you have to find a good time / place to turn it on. Too early, and you burn battery / storage. Too late, and again you run into people / attract attention.