I am old enough to remember that Microsoft also had a similar free email product for custom domains called Microsoft live mail or something like that. In fact, you can still find articles on the internet about how to move from Microsoft to Google workspaces when Microsoft killed their free product.

I think even the users of this product knew that email with custom domain is a premium product that pretty much no email provider provides for free. I am still surprised that they let it run for 10+ years.

I dread the reaction on HN when Google finally decides to kill Google voice , which is another very popular but free Google service. In fact I am sure that running Google voice is even more expensive to run than workspaces because just the cost of assigning a phone number is some fractions of a dollar to the FCC.