For any residential appraisers who feel this will not affect them too much because they have a good diversified client base and/or do not rely on mortgage lending appraisals--consider this: as work starts drying up for the skippies, they will start looking for other sources of income.
They will start going after the better direct lending clients. They will start going after the estate planning deals. And if you think your client is loyal to you, wait until they have a choice with a fee that is now $150 less than what you are offering. That is where client loyalty will really begin to be tested.
This is a zero sum game. Some will exit, and some will, by necessity, be forced to expand their client base, even if marketing is uncomfortable for them. Never underestimate a hungry appraiser.