The only reason Bit-Keeper is annoyed is because they see a free product competing with thier own. Most companies adopt a business model of giving the client away for free and charging for the server. To the best of my knowledge, Tridgell was reverse-engineering the client, not the server. That shouldn't have resulted in any revenue loss to BitKeeper if they had followed the traditional business model. Wasn't BitKeeper also giving their client away for free?