LinkedIn polls are relatively new and a great way to create engagement.
A good rule of thumb would be to create a poll 1x per week. Be consistent and the more polls you create, the more others will start to respond.
If you don’t get response the first few times, DON”T GIVE UP!
It takes time.
This article is a good “How To” do it. Let me know if you create a poll so I can go take it.