This has the immense advantage that there's a large corpus of games available to learn from as well. I don't think Battle.Net saves all games ever (only locally

This has the immense advantage that there's a large corpus of games available to learn from as well. I don't think Battle.Net saves all games ever (only locally on the computer), there's still many thousands available online. But man, if Battle.Net did save all of them, there'd likely be hundreds of thousands, if not millions, available. That'd be pretty spectacular as a training set!