The difference is Paul has a large contingent of younger, techie almost cult-like followers who understand how to do things like delete cookies and write macros to spam vote in polls like this. In general, most folks on FR are simply not going to be as good at that sort of thing as kids on 4chan or reddit. For a lot of these younger people, supporting Ron Paul is sort of part of their online rebellion.
That's cuz FReepers, Conservatives, are hard working HONEST folks who work within the system.
Paultards, ows'ers and dems (I know, redundant) not so much.