Actually, the company, Fortinet, is looking into the matter. As the article states, they don't sell directly to end users, all sales go through resellers. Their policy with their resellers states that all US export laws must be followed.

So the company apparently does care and it isn't yet clear how this software came to be in use in the embargoed nation. For all anyone knows it was pirated by a Burmese government sympathizer who worked for another company that attained it legally. Let's not pile on this company in undue haste.