Many FOSS projects have Pro versions (Redhat Linux / Cent OS Linux)
Best One Liner about commercial Open Source software : The only kind of profit strategy that is incompatible with Open Source is monopoly-based sales, also known as "royalties". [] http://opensource.org/faq#profit
But Moba isn't selling support. They're giving out crippleware and charging money for a professional version based on the core. How are the modifications that make the pro version not required to be open source?
Its built-in SSH server is great for moving files to and from my workstation quickly when I need it.