In the world of OA publishing, there have been further (not-so)shock waves reverberating this week as Knowledge Unlatched was sold to Wiley. One of the questions this raises is: how was it possible for this sale to go through and what could have been done to prevent it? One of the first points to raise, and one that I have already made on Twitter, is that Knowledge Unlatched had to take a corporate form that protected its founder’s investment.