Meta released an update of their Llama AI today and it has a mostly open source license. It's 100% free as long as you have less than "700 million monthly active users in the preceding calendar month". That's cool, but it seems like a pretty arbitrary number. The current world population is 8.1 billion people. As long as no more than 11.5% of the world's population uses your instance of Llama, it's free to you.