True, but also let's be realistic about the impact. Lifetime value of a customer is quite low, there are definitely not millions of us. And then you have to consider the costs as well. Even 10% of users using only web might be a losing proposition for them, because the cost is also developing parallel web app (in addition to iOS and Android app) and fighting spam, bots and user scripts. With the attestation they can be fairly sure that the client is not a script, etc. Maybe not in theory, but definitely in practice.

It might very well be that switching off the web will increase profit despite losing a significant percentage of customers.

Also my particular one action, especially if it's free service has basically zero say in this, it's a rounding error. And I can only influence my actions and native a few hundred people (but realistically, probably a few dozen).