Alright, I've told this a dozen times already but I understand that it's hard to find where it was posted
Here is what happened with me when testing this:
First I made a proxy with proxy keywords, got around 10 clicks, worth $0,25
Than I made another proxy with high paying keywords, got around 1 click (after waiting a few days..), worth $0,14
So what's worth more you guess? The proxy-based keywords. And it's easy to understand. People visiting proxy sites are interested in proxy stuff, not stuff about loans, forex or other uninteresting stuff
Good luck with your proxies mate!