> Is the site market game's score for the reader poll based on the number of people who vote in the poll, or the number of people who visit the page that lists the results of previous polls?

Good question. The answer is the latter: voting in the reader poll actually has no effect whatsoever. It's the number of people who actually visit the URL http://www.rinkworks.com/poll/, which is the page that lists the results of previous polls and provides a link to the current question.