If you consider voting pointless but value being 10c richer at least a little bit, then on Liron's premises you should maybe be willing to vote whichever way gets you the 10c.

Only in the simplified abstract model of the situation. In reality things like the ability to brag that you did (or did not) vote for that bastard (or that bitch) or, say, even minor shifts in self-perception are worth more than 10c.

The point is that if you don't know my value system you cannot say what would or would not be rational for me to do.