While it hasn't shown so lately, Don does come from a grassroots background in gaming as a former 17 year old co-founder and programmer of Distinctive Software in 1982. His company was acquired by EA which likely put him on the path to executive level success. A kind of exit that some founders dream about.
It's easy to make a judgement and discredit or target him but I do believe he has genuine passion for gaming and hopefully he can infuse some of that in a place like Zynga.