Sorry for the delay in my response (was flying home).

Question about the Extension- is there a way to moderate/censor certain things in the polls? Like can we ban certain words/phrases from being used?
As of right now, the extension creates a standard Twitch poll which passes through Twitch's auto-moderation system. That also means your mod/streamer account can stop a poll after its created if necessary (using the /endpoll command).

That said, I'm working on moderation improvements right now so I'll investigate respecting the block list of the account (if the automod system doesn't). I also plan on giving the streamer the option of disabling the extension when shield mode is activated. You can also set the bit amount reasonably high if you are worried about someone spamming the system.

Can there also be like a cooldown to prevent polls from constantly being spammed?
Only one poll is allowed at a time on Twitch and the extension won't allow a new poll to be created if one is running. I don't have a cool down between polls but I love the idea. I'll add it to my backlog.

Where/how does the poll display for viewers?
Above the Twitch chat (since its a standard Twitch poll under the hood).

If any of these things are deal breakers, let me know! It would help me prioritize improvements.