You know what they say about IOT: The S stands for Security.
I am hopeful that the lack of "karma" feedback to posters in Lemmy/Kbin will dampen the farming that goes on over at Reddit, and that posts are about contributing ideas or whatever content is expected in order to be a part of the community, rather than trying to get "upvotes." Granted, that's a huge driver of activity on Reddit and helped them grow to the size it is, but it's also why there's so much low-effort content there these days.
On Firefox:
Well of course they do. They want to turn an every-few-years OS purchase into a monthly subscription fee, like they did with O365. And eventually they'll drop the ability to install apps except through their store (under the guise of providing "safety" from malicious apps), so that they can collect a commission on the third party software sales market as well.