Well, 6,000 is a pretty penny for a DNS failure.
Sure your site isn't one big blind/dead link?
And from what you've described, your app isn't worthy of more than a free download at a public script archive.
Sorry, but that functionality is done by everyone anyway (Like every free porn gallery post site in the universe), hardly a unique idea and something that can be created within a day.
I mean how hard is it to make an app to
update/delete a database record based upon a link or my webspider reporting a 404 on the request?
Not very hard at all.
So get over it and either toss it or hand it over to some newbie coder who might be interested in maintaining such a basic application.