BPL,
Your last product is broken.
Put some technology in place to prevent the spam bots. If there isn't a CAPTCHA in place on the user sign up, get one in place. If there is a CAPTCHA in place, then it's busted and old and needs to be replaced it with something else.
Also, the search is busted and has been broken for a long time now. Switch to an integrated Google search. It's cheap on its own and and free with ads.
Both of these are fairly simple and near drop-in solutions.
