Why would they not find the thread? If you want to keep it front and centre, post another comment on it and it'll stay alive. People can also find out what you've posted by going to your profile page.
There are many of us here who never utilize that Popular button. In fact, during our discussion last week, someone else who'd never used it clicked on it and said they'd never do that again because they thought the topics were silly or some such.
Everyone can't possibly be interested in everything everybody says. I'd much rather have posters I respect and like clicking in (and responding) than masses of posters I don't know thumbing it up. I honestly have never even looked at the thumbs up/down numbers on my own threads.
I've posted a few games threads that have had 2000+ responses and 3 - 5 times as many viewings... they're only interesting to people who play games, so the numbers are irrelevant. If someone votes it down, it just means they're not a games person. That doesn't hurt my feelings at all.
I've posted many topics that are only of interest to a few. Why should that bother me?