Oops, I accidentally upvoted you, which forces me to be annoying and reply with "-1".

Do not do this. It's spam. It's unethical. And on top of that, it won't even fucking work.

Invest your time in creating a product that people will seek out. If you can create such a product, there would be no need to do what you're talking about. If you can't, then even if you do, nobody will care anyway. You'll only drain your karma trying.