Makes for an attractive customer base. I know that there have been a number of studies, that found Apple apps make a great deal more money, per app, than Android ones (I'm sure there are special outliers in both camps, though).
I make free apps. In my case, it has nothing to do with "snobbery." I've just been doing it for most of my adult life, so I'm invested in the platform, like many of us do.
I also enjoy working in a challenging environment. I've learned to adapt.