I would pay $25/month for this service. I might pay $100/month for this service. No ads necessary.
https://twitter.com/goodside/status/1599094067534516225?t=n9...
And there will be companies offering the product for free in order to grab that market share and steal users from the paying ones.
That's how the internet companies strived since ~1998
Spoken as if a sustainable and profitable business model prevents ads from being shoved into a product. It does not.