I'll vote on any good posts if I can. I've had a second payout on at least one post. Some will not get appreciated in the first 24 hours. They may only get discovered by some people much later and not everyone is on here all day, every day. Personally I think posts should accept votes indefinitely as they may still be useful months later. When the next million people join up over the next year or so I'd like my old posts to be able to benefit from them. As it stands you might have to re-post items to get the full benefit.