OK. I wish just one topic with four or five choices was given each week. To thoroughly read and vote on 18 is really time consuming, but I would vote every week if there weren't so many each time to read.
You're spot-on. We've actually reduced the contests to one Topic per week, and your comment is one of the main reasons we've done so. It's much easier to promote a contest with a single link and engage more readers to vote.