FWIW I think there was a bug in a version of Discourse (or it was intentional I have no idea) but if a post was edited or other non-contributory actions (lie moderation) were done, it would bump the topic, again think it experience of it for too long. It caused a lot of confusion and sometimes in strained circumstances, people would interpret it in a negative way and lose the head. Rare, but it did happen once or twice. Obviously this was more random than the proposition above. I've never used a bump feature ever, other than old school "bump" which is sometimes a humorous affair and clearly signals the bump. I rather create and see created topics that will stand the time and value that need regular updating., constant maintaining because they are hot or timelessly useful. I also would think about more editorial management than allowing social management of information, because the "social" is over done IMHO and now Ai can be just as "social" as the next bot.