I bet Adsense bannings will come soon. A lot of them use keywords like Forex to try and get more income. However I still don't believe they should be blocked from listing sites.
Anyway submitting to lists is one way of getting traffic to your proxies but there are many others. When I was promoting proxies I was mainly focusing on SEO. It may be harder to do these days but getting to the top for some of those keywords like "unblock facebook" can mean lots of traffic.
Programmer, web developer and entrepreneur.