The 24h pulse UX in jumble is very good and I think it should be used in many other contexts, especially chat apps and small world media.

You get very cheap yet very effective way to keep up with people you follow, and if, IF you want to see more you can go read it from their data host.

Just enough aggregation to be dangerous, and actually saves on bandwidth Vs if everyone has to send a notification to all their followers.

Very useful but cheap enough it can remain decentralised.