Speaking for myself, as a verbal expert, I can only volunteer so much of my time, and need to make a living like everyone else.
I have never gotten a single client from GMAT Club for my verbal tutoring, which I think is quite shocking. That's fine, but it means my time here is rooted in charity and not a means to promote my business.
As a self-employed professional who trades dollars for hours, I only have so much time to donate, in face of the many priorities of a small business owner.
I hope this offers a little perspective.
Farrell Dyan Hehn, MBA
Admissions Consultant & Verbal Strategist MBAPrepCoach.com