I have officially stopped using Smowtion on my websites.
It infected the computers of at least one visitor.
A close friend of mine was browsing my forum, was redirected by an advertisement, and infected with a Trojan, and had all the photographic (screenshot) evidence to prove it.
So, if you want your visitors infected, stolen and harassed - go with Smowtion!
I'm sorry your experience was bad.
I'll continue using Smowtion for now, it's still working the best for me - and a lot less crap than RightMedia ads.
However, I am using Smowtion a little less now as I am looking into using more and more CPA and direct advertising for my proxy.