I like the idea of being able to trade subscriptions. As you say most games seem to take on the generic gold farming aproach and so it would be great to see more dev’s innovating in this area. Also a custom currency could potentially promote a devs project since exchanges can adopt their coin and all of a sudden a small indie project now sits in a crypto stock market full of hungry investors and the types of tech enthusiasts that are likely to play games. I imagine that one day game dev’s won’t care about subscription models because they will be able to fund everything simply off the fact users are trading their commidity.