Generally no, because you can only vote for one answer, and when I see responses there are only a few up, and when more people reply, someone else might come along with an answer even better.
I do but I had never realised there was a "payoff". Hahahaha. I just thought that, if it gave me the option, I should vote. (yes, I am that dim.) I also wait until there are a fair few answers to pick from.