It definitely does, but it has more to do with the fact that it's waterproof than anything else. Oil does not cause acne. You can have oily skin and no acne, and you can have dry skin and acne. Some people have pores that aren't very good at getting rid of dead skin cells just as helen-rox said, and some people have a tendency to get infections in the skin (the bacteria on the skin itself are not harmful and do not cause infection). But oil does not cause acne, though it's a sign that the glands are overproducing oil. And you def don't want to put anything super pore clogging on oily skin
But then again...everything you put on your skin does clog the pores, some ingredients are way worse than others though. I like that the F&B forms a waterproof film, it keeps my from getting dry during the day
I will say, though, that it's nearly impossible to put a thick layer of F&B on your face, which is probably why it doesn't break me out.
but because I wanted one that would give me a rather fresh, dewy face (my other foundations all give a matte finish..). I've used it for 2 days now and I really love how it feels on my skin. It's less moist than face and body (which felt too sticky for me) but doesn't dry entirely as other foundations usually do. It has a tiny bit of shimmer in it, but it's so subtle it's almost not noticeable. Believe me, I usually shy away from anything that contains too much shimmer/sparkles, even for eyeshadows I prefer matte 
. I do powder my t-zone because I don't want to look dewy all over my face and because I tend to get oily there..
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