That was a total scam! But be aware that legitimate Mystery Shopping is alive and well. My bank account is living proof of that. $1508.00 last year to be exact. The most I did was 4 shops a week because my time is limited due having a part time job. I usually only do 2 or 3 a week. You have to choose shops intelligently. Weigh the shop fee against the cost of gas to get there. Also for me, if there is not a shop fee, but only a flat reimbursement, those are usually a waste of my time, because usually the whole reimbursement is absorbed by whatever it is you had to buy.
I have a ledger book that records my shops, the fee I was paid,(and when) and the cost of gas to get there. I now work for about 15 companies, and my shop scores have been high, so I get a lot of offers, actually too many to do right now because of my part time job. You need good obsrvational skills, good writing skills, grammer, spelling, punctuation and sentence structure, and the ability to role play and be convincing at it. I am a former law enforcement officer, so I have all those skills.
I have never paid a dime to mystery shop, and if you are ever asked to pay to become a Mystery shopper, that is also a scam. Some of my shops are at food establishments, and I have been reimbursed for the meal I ate, plus a shop fee. The last one I did was a $20.00 shop fee and a $60.00 allowance for food and drink. This allowed me to treat a friend to a meal, and I got my shop fee and got reimbursed for the meal too. Most companies make deposits into your Pay Pal account, and a few just mail you a check.