Open source is a tough business
There aren't that many examples of financially successful open source software businesses. It sadly doesn't surprise me that he's been forced to take this step. Most companies I talk to are basically unwilling to pay for software. They're so used to getting what they need for free, most of their staff don't even know how to go about negotiating a software license even if they wanted to. Not to mention that they'll generally prefer to use bad open source software over paying a nominal amount for a well written closed source competitor. While I benefit as much as anyone else from all the open source software available, I do feel bad for those who are trying to make a living from writing it.