Same reason they open sourced reactjs or encourage jestjs usage. If they give it away they can benefit by being embedded in the stack. Then all the scale issues

Same reason they open sourced reactjs or encourage jestjs usage. If they give it away they can benefit by being embedded in the stack. Then all the scale issues they can beat implementers on because they have the money to run it. To keep ahead of people implementing their tech they have their own data trove to train on. You only get a small piece of it. It’s all to position themselves as a sensible solution.