Software development takes time and has many unanticipated challenges that makes time estimation difficult. When developers do provide estimates users, managers etc then get stroppy when they slip by.

Therefore the best strategy is just to ignore requests for time schedules because it’s a no win situation.

Karma might work on a per instance basis, but if implemented on a federation wide scale you’d have to trust every instance. It would be far too easy to artificially increase your karma with your own rogue instance just by editing the database.