The strategy over the years has always been the same:
1. create a necessary product and give it away "for free"
2. wait until people are used to it and consider it essential and difficult to migrate
3. close the gate and make it no longer free.
For example : Gmail for organisations (at launch free up to 100 users, then 50, then 10, then 0), Maps for websites (lower free tier now), Google Drive (lower free tier now), Youtube is next ... That these are the "best" products in the world is a subjective affirmation. They are pre-installed on devices and difficult to remove ...
They can do whatever they want with their products, of course, but trying to control the openess of the web as we know now, it is a different thing ...