Its literally so stupid that they posted these at $5. I do them when they are around $20. The new guidelines actually add 1 additional photo per plant, so now its a bit more work. They usually start these at $10, so the $5 is just...ridiculous.
Grocery/Drug Stores take about 20 minutes onsite to get all the pictures, and then its about 20 minutes to upload all the pics and answer the (multiple-choice, no narrative) questions.
The big box home stores I would never touch, as I'd assume 45 minutes onsite and an hour uploading pics.
These require a lot of organization and the ability to enter tedious amounts of info on your mobile device.
Under no circumstances should anyone do them for $5!