I would like a poll where it costs some sats to vote so you don't get spam or brigading.

In a sense, the upvoting is a stripped down version of a poll, so it's already in a sense a feature, I'd just like more ability to survey the Bitcoin community with sats. Also, it would be nice if the sats collected can go somewhere like a charity, or even better if the sats were sent back after the poll closed (staking, basically).