Personally speaking, $20 is a bargain compared to the cost in personal time and effort to build and install it from source. I imagine that there's a sufficientl

Personally speaking, $20 is a bargain compared to the cost in personal time and effort to build and install it from source. I imagine that there's a sufficiently large demographic with enough money that $20 is basically free but not enough money to have a personal assistant to set things up while they do something else.