Why do you need 500 votes in order to respond?
I hope that you respond to all useful ideas. Setting 500 votes seems a bit ridiculous. It appears that the only way someone will vote for the excellent ideas I have posted today is if they search for something similar and see my ideas. I would hope that you (the OD managers) review all ideas and classify them as potentially useful or useless. I agree that ideas you class useless only need a response when they reach a certain number of votes.