" How many people out there really make their money checking in open source code?" As an example -- Last I checked, most kernel commits were done by folks paid to write code. Similarly, most Ubuntu work is done by Cannonical; Debian, GNOME, Mono, Apache and Webkit (among many many others) all have paid open source developers.

"he needs to run .NET non-stop and copy/paste code from Reflector to his Mono implementation" That's a pretty bold claim to make. If you're not trolling, do you have solid evidence to back this up?