I know a couple of appraisers/firms in my area who did try to drum up PMI removal business. Neither one was very successful. A one-man operation advertised then spent a lot of time on the phone with potential clients. Once he "sold them" on the idea they called their banks who then just used another appraiser. The other company spent a lot of money researching and ended up just giving up for poor results (effort not worth the reward).