Scrap it. We're missing out on a lot of votes because of the stipulation. One vote every 30 seconds is fine, but making people wait 30 minutes before voting on a good post is insane.
Anything that makes this more profitable and less complicated is good. The help docs are difficult to understand, even for the tech savvy.
RE: HF Proposal - Is it time to decrease or remove the 30 minute author-curation reward window.