I did the signage, and I agree -- easy peasy.
For the testing cards, they send them to you. I wasted 6 hours on printing/studying the guidelines, taking the test, e-mailing the scheduler and trying to map a route. Because you can't plan a route until you pass the test!
Then I figured with the distance I had to drive, not being able to use the app to immediately report (the shops were where I KNOW my cell phone won't work!), I would end up basically paying them for the privilege of working my you-know-what off for perhaps a week (they say a shopper can do 20-40 of these a day. Heck, I couldn't DRIVE to 20 of them a day!). There is a small reimbursement for the required purchase, depending on the location (you're required to buy the "cheapest" item available. Good grief. I could spend all of a day just looking for what's cheapest for 20 shops, LOL!).
Yes, I realize 50-75 of these shops are in one city. But it's a city I've never been in, they won't pay for parking (or maybe they will, with a receipt; I'm not sure I remember), I HATE cities, especially the ones I've never been to (just traffic, you understand; I have no other objection to cities).
Just wouldn't pay if you only get 20 done in a day, and spend the entire pittance you earn on a reasonable hotel. Then gas and eats, too.
And if you do them this week, you'll have a looooong wait for your pay -- first week in November.
That's just my experience; YMMV.
I've heard this MSC offers bonuses; I asked about that, and got a resounding "NO!"