[OnesimusUnbound]

Hmm, for an example, in twitter, the popular accounts are one of the strongest "hubs". Their post can influence many "nodes".

I'm not sure how I can relate "self-loops" in my example.

[sleepyams]

Perhaps a self-loop would represent time spent curating one's own profile (or crafting tweets) as opposed to consuming others?

[amelius]

Echo chambers?