Running a .org as a for-profit is fine. For-profit Craigslist is the best example that I can think of; CL is pulling in tens (hunreds?) of millions in revenue.

Running a .org as a for-profit is fine. For-profit Craigslist is the best example that I can think of; CL is pulling in tens (hunreds?) of millions in revenue. The only real risk I see is possibly confusing your users.