What made that specific version of the Reddit app best overall is that it flowed back into your home screen. I've tried to make a diagram to explain this for you.

Your home screen then became a rotating dispensary of aggregated community-driven content, which is ideal. The user became the algorithm with no need for all of the excess.

This of course was already powered by reddits algos but those are what will be replaced by sovereign algos.

This is of course from memory so I may have a bit of fuzziness but this was the general mechanism.