I just recently did a test with 7 search and by using Google Analytics I have been able to figure out where most of their traffic comes from. I noticed before this test that 7 search delivered what appeared to be bot traffic, since the conversion rate for their keywords where 30 times worse than Bing Ads and Google Adwords. After the test, I noticed a huge bulk of the traffic came from domaingateway.com, which is basically another place to buy advertising. 7 search seems to be outsourcing their traffic. If you are planning to use 7 search be warned. A lot of their traffic is fake. It costs me about $5 per lead on 7 search unlike Bing Ads which costs me 30 cents per lead.