I am aware of only ONE suggestion that was ever acted upon (although governmental rather than private). And it illustrates the importance of WHO makes it.
I used to attend annual CPE statewide seminars sponsored by the University of Arkansas. Many moons ago our seminar fee (books, breaks, blather) was nicely 40 bucks ($240 now, I think). Then one year a new lecturer showed up and, first thing, said "This seminar fee is ridiculously low; I'll speak to the board about it." Lo and behold, next year the fee was $100. And, we were moved from Holiday Inn to the break room of a local factory. Who says government can't operate efficiently?