You will find that A and C and I will never agree on this one. Probably something to do with him being involved in maintenance.....
A CAMO is doing nothing more than the job they should have been doing in the past but with structure around it. There are many maintenance organisations who have take it as an opportunity to rape the customers for that bit extra forgetting that they are killing the golden goose.
Thankfully there are a number of maintenance companies who prefer the honest approach. I pay nothing more than I did before Part M. I suggest you hunt around for a company that are not going to rape you.