I read it. And I don't dispute what s/he is reporting ($450 SLA, $350 must go to the appraiser).
But riddle me this... What happens if the AMC cannot fill the assignment at $350? What happens if it must pay $400? Not the appraiser's problem, you may think, and you'd be right. Except that if the AMC in question has other clients who do not set the minimum fee to be paid, then they will be under pressure to squeeze out the margin from those other clients' assignments. And, the AMC may decide to dump the client (that happens, BTW, despite the order volume); then, the client tries another AMC until the same scenario occurs. That isn't a sustainable solution and doesn't address the problem.
The one example isn't a solution to a systemic problem.

For cost-plus to have a chance at being adopted, appraisal fees have to be removed from the no tolerance bucket. We are talking about the current regulatory environment scheme.
But, I've posted enough. Gnashing teeth and wailing at the AMCs is a waste of time because that is not where the issue is in regard to the cost-plus model.