An out-of-left-field option, if your goal is only to make some money working with ML: go into independent game design and create a game around a ML system.

It's not something mainstream gaming would be interested in using because the goals are different - there the development process is enslaved to some well-defined intellectual property, and (with rare exceptions) does not roam freely enough to allow more than a "good-enough AI opponent" - but if you developed a concept and brought it to market yourself, making sure that the result is fun to play and easy to learn, as well as a good use of tech, you have a shot at a decent revenue stream. Probably not enough to live on, but the beauty of independent gaming is that you can keep revising and expanding on an innovative concept, gradually growing your own market over a period of many years.