I wouldn't call them "standard polls". If they were "standard", they would have been kept. The reason they don't exist on UCP is because they are not standard and Fandom didn't want to go through the effort of re-writing all the code to make them work again.
Interesting. I just assumed it wasn't maintained because Fandom dropped it. However, you are right. It looks like it is still maintained; probably for ShoutWiki. So then they question is, why did Fandom drop it anyways?