On the one hand I can imagine nothing more bitter than other people making money on your hard work.
However, isnt this how the whole thing goes? I mean there wouldn't be a linux kernel without the work of a whole bunch of companies. Did they get sponsorship money from you? grsecurity wouldn't exist without the work of a bunch of other people. Did grsecurity pass on money to other vendors that they rely on? What about people that wrote the drivers that grsecurity use when they did development.
Open source only works because people contribute to a shared base. In return for their contributions they get to use what others already contributed.