If you don't race why would anyone give you anything to promote their brand? If that was the case every company would give away free stuff to every person who rode a bike.
The point of sponsorship is to advertise. If no1 is seeing you then it's not exactly advertising. And if you said that you were sponsored by some company, wouldn't that company want to only be associated with "The best of the best"? which your obviously not, otherwise you would be racing.