OP makes it seem like Reddit's users lose something when Reddit panders to a Marl. But I've observed that the majority of them don't care (enough). Some even like changes we view as invasive. I talked to someone once who told me "Aren't personalized ads so great? I was looking for new shoes, then I see an ad for the perfect shoes. A few clicks and now I have great shoes!" These people exist, and I suspect that they have to exist for ads to generate any revenue.
I do think that it's wrong to paint those who (still) use Reddit/etc. as brainless scroll-zombies, though. They just care about different things.