Because when something is open-source, reseaechers are more prone to adopt them. Companies pay less, and the market will be your. Instead of centralizing trhough open ai añi or microsoft azure, the let you run those models on your stack. You domt need to pay fees there. More people get involved, the models grows, you have free qa and developers working on the product. Alibaba is getting a lot of revenues just because people are switching to their infrastructure.