If you can't get someone else excited about your product, then you might be approaching it the wrong way. But there are many reasons why VCs might not want to get their hands in. They might deem it as a me-too or as a novelty not worth exploring. But there's no way they can completely estimate the web community. If you have a firm belief that you offer something someone else does not, or you implement it better, do it. Fund it yourself. The true reason you should give up on your idea is if you cannot sell it to yourself anymore.