I don't know if it's still true, but you used to be able to message the moderators and request a poll. I did it several times a year or so ago. As long as you give them a question with several response options and they agree that it's a good question, they would post it. This way you could hit both the book readers and the non-book readers.
I hope they still do it. We had lots of fun with them back on the OUAT forum.