I have the same experience with running adwords. All I get is signups with fake email addresses that never log in. They are obviously bots or mechanical turks.

I have the same experience with running adwords. All I get is signups with fake email addresses that never log in. They are obviously bots or mechanical turks. I've tried tuning the keywords and regions, but eventually gave up on it. I have spend hundreds of euros on adwords, it created good traffic but almost no conversions.