Just to elaborate, the only real currency we have with the parties is cold hard cash (where we’re hopelessly outgunned) and votes. Giving away our votes without demanding something in return is selling ourselves short. We will /never/ have any sort of real change or progress if we hold our nose and vote for the lesser of two evils. We will only continue to lose ground as we devalue our votes by giving them away for nothing.
I see what you’re saying and I subscribed to that strategy long ago, but in the long run it’s clearly a losing strategy.