He is a "free software programmer" according to Wikipedia, and I really value his contributions to both the GNOME and MONO projects.
I am not trying to in anyway put down his acheivements but his comments on social media (G+ and twitter) are often about ordering truckloads of Apple products.
Was there a falling out with the Gnome project or why is he such an avid supporter of the Apple brand? Perhaps its just a case that he has moved on from his free software roots. I appreciate that his company xamarin are working solidly on Mono which is open source, but a number of their products are not open source such as Mono Touch and Mono for Android.
I'm not saying that he shouldn't be allowed to sell software but I am curious what has caused this shift in philosophy or perhaps his involvement with the free and open source software was simply about producing code rather than the free principles behind it.