Yes, the whole idea that ML is free/cheap is extremely temporary. Even these $15 a month subs are not cutting it. I even expect the likes of nvidia too to have, dlss 4 or something on subscription.
I was involved in a small scale ML project with ~20000 users, and the amazon bill was going higher and higher. At least as long as we wanted to do a good job. If Microsoft and google have a race for the best ML datacentres the costs will skyrocket. Google wanted to develop their own custom silicon though.... which will be doomed to failure because they microdose so much that they can't keep any project for more than 13 months.