Infolinks Double Line and Single Dotted Line Comparison

Infolinks provide two types of their in text ads, double line, and single dotted line. Infolinsk suggest to use double line ofr their in text ads type. They state that double line will have better performance.
When first time I joined Infolinks, I used double line. Performance is very poor, in the context of number of clicks. Then I tried to use single dotted line. Compare with double line, performance is far better. I think, single dotted line is appear as part of content than as in text ads. This gives more possibility to click than as it appear as in text ads.