From a business perspective, the difference between open and closed is a little bit overblown. From a security perspective, the difference between open and closed models is, for some intents and purposes, overblown. The most important thing is how powerful a model is. If a model is very powerful, then I don’t want it given to the Chinese by being stolen. I also don’t want it given to the Chinese by being released. If a model is not that powerful, then it’s not concerning either way. (source)