He was considered crazy, kooky, conspiratorial.
Then he became popular with the enthusiasm of grassroots activists. People were running across interstate highways to post his signs, donating their paychecks to "Google Ron Paul" blimps, spending time after hours blogging online, etc.
Financing your activism is not profiting off of Ron Paul. And even if it were, the profit motive is noble.
He's coming across as a hypocrite and ungrateful. But it's a not a bad thing. It's a reminder that we're all human and shouldn't adulate celebrities, esp politicians.