With AI they need to desperately steer the narrative away from API based services (OpenAI).
By training LLMs, they build sales artifacts (stories, references, even accelerators with LLMs themselves) to paint the pictures needed to convince their enterprise customer market that Databricks is the platform for enterprise AI. Their blog details how the entire end to end process was done on the platform.
In other words, Databricks spent millions as an aid in influencing their customers to do the same (on Databricks).