I think you need to change the way you view this from short term to long term game. If you have a free app that you want people to use and know about, help the guy out as much as you can. Leverage the limelight of your app and yourself for fun and/or profit. Find a way to monetize your free users, just build your reputation and get paid for lots of consulting gigs, or just be happy people appreciate and use your work.

Many people in your situation would beg or pay to have that kind of exposure. Don't be greedy. Give and ye shall receive.