It just there too many incidents where something happens to a game in development ranging from something happening to the developer to the developer doing something horrible that can lead to a project's demise, and some people don't want for a game they want to be finished but that's not all the reason ever time, some could be saving up for something more expensive, some may want to buy the full version when it's done, and others... are just looking for a way not to pay for it, it's understandable save for the last one