The tale is as old as time, something starts out as open source, gets popular, gets bought and is drained by the "corporate vampires" you're alluding to, either through acquisition or other means.

The only silver lining here compared to any other type of software, is that legally, this software can never be anything but open source -- so we are all free to fork and attempt to do a better job, and make a valiant try in not repeating history.