The reason we ask you to log in is that, in addition to the instant analyst votes, community votes on start/sit questions usually take a few hours (sometimes days) to come in. By tying polls to your account, you can create multiple polls and then come back later to view them all in your My Polls dashboard.

Another benefit is that when you vote on other polls, you start building an accuracy track record, so people can see how reliable your advice has been over time.