I've offered it on occasion but not a lot - you have offered that kind of help more often which is commendable. I do however post to offer help wrt appraisal problems which you do as well.
BTW I stink at marketing and therefore have nothing to offer in that area! I was able to get direct and high end work and in the past review work because I am capable of appraising many diverse property types and supporting the value well. That means a 100 k property or a 1,000,000 property. But I suck at marketing, I don't even try - my business is more of a boutique business that works for me personally.
I might be a good example of what not to do . I have no website, do not give my card to agents except on occasion, though I got two referrals to very good clients from agents. ( the clients called me, due to their giving my name ) I do think providing strong support for opinion and able to handle many different property types is useful for clients and they seem to need it. I have a background as a as a RE agent, (I sold RE for over 5 years prior to appraising ) and that imo has helped me understand markets and buyer behavior.