I agree with Phoebe and I understand completely. I haven't had similar problems, and performing Chipotle shops currently meets my needs.
But, my reasoning is: Although I like Chipotle, the food is cheap. I can easily afford to eat Chipotle on my own dime and have no report to write, unlike other, more expensive restaurants where I would not eat unless I was performing a shop. At a more expensive restaurant, I would probably spend the same amount of time on the observations and the report, but I would be compensated with a more expensive meal, giving me more value for my work.
I continue to perform the Chipotles because the MSC is so nice and so professional and because the scheduling is flexible. It makes it easy to fit into my schedule any time I want. That flexibility is important to me, and it's a major reason I continue to do the Chipotle shops even though the financial payback is not great.
I don't think it is the comments that bother Phoebe. If she could just read the comments and move to the next shop, I think she would. It appears to me that the editors are coming back requesting clarifications. If I were getting multiple requests for clarification after each shop, I would begin to feel unsuccessful. At the same time, the time spent responding to those clarification requests would add to the overall time spent on the assignment, making it no longer worth it to me. I think it's a matter of how much aggravation might I feel getting clarification requests to which I must respond and how many requests might make the time spent on an assignment no longer worth it.
Kudos to Phoebe for evaluating her situation and making a well-thought-out analysis of "not worth it." Also - kudos for writing a perfect rant - professional, well-written, clear, detailed, and no bashing.