I've noticed there are three main types of social media information: text, circle and square.
Do users prefer one? Do users click on one faster?
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Manipulating people is advertising. Sit down with someone in the company's advertising department, along with someone from design (the person that lays out the ads) and think about this not as an app thing, not as a web thing, but as what it is, an advertising thing. The worst thing you can do is put people off. If it's appropriate for the context, it will work. It's the other factors that are 100's of times more important.
Note: I have posted this as a community wiki because I take no credit for this answer. all credit goes to @Confused.