My guess is that when Llama leaked on 4chan and it blew up in the community it somewhat forced their hand to go with an open strategy. But they also have a hist

My guess is that when Llama leaked on 4chan and it blew up in the community it somewhat forced their hand to go with an open strategy. But they also have a history with pytorch of reaping the benefits of an open strategy. The benefits are well explained in Google's leaked "We Have No Moat" document.