I would be surprised about that behavior even for 10% people doing real AI usable work. Very few people buy new motherboard or CPU or gfxcard every 3 months?
Even now just because the latest Anthropic is super great doesn't mean people are not using other models. Not everyone is subscribed to only the best.
Another worse offender is gitlab. They send promotions hidden as a part of this is obligatory account related into telling blah blah and adding BTW see these extra features for more payments.
In concept what you say is correct but reality is complex. There are very few providers that implement friction free login/password and importantly security. A large number of email providers didn't implement 2FA until very recently. Even those that have terrible apps, ad infested, no app password or oAuth etc. so many governments use MS hosted services.
It is akin to Visa/MasterCard duopoly. It is hard to escape but even if one does it then it resulted only inconvenience. I still don't have my cards in phone - neither will google change path nor will govts force a change.
You don't learn or understand modern bootc?