The thing is though, .NET Reflector used to be Freeware, written by a guy in his spare time (incidentally, who is now an architect on Blend). He sold it to Red Gate, who keep trying to monetize it in increasingly intrusive ways (forcing updates, popping dialogs, etc).

While I understand Red Gate's need to make a return on their work, they've gone about it in an unpopular way, trying to force people to pay for an extra feature (debugging through code w/o source) that many people simply don't want.