Author of the post here. Just reading the comments so apologies for getting some of the terminology wrong. The intention was never to mislead folk , just wanted to share my enthusiasm for emulation and the fact that you could get working code.
It seems hopelessly confused, because there are no open source models, only some that allow free redistribution of the model weights. Perhaps they should be called "open" and the word "source" should be dropped.
This is debated until the end of time. Open weights, whatever you want to call it. Essentially people and companies can use LLama 2 commercially as long as you have less than 700m MAUs if I recall correctly.