That's fair! Although I fear big money will always come up with some way to make a "better" UX, either simply because they can afford more/better devs, and often by compromising privacy, accessibility, etc.
embrace extend extinguish has worked in the past and it can work again
The ad revenue part is true but what do you mean by not harvesting data? Mastodon definitely stores your boosts and likes, it just doesn't use that data to recommend more content. And the big difference is of course that it is stored on your instance's server, not a centralized location.