After spending much of the day doing events in Orr and using 3 of these boosters. I’m pretty certain they are bugged and either not working at all or giving only 5% karma instead of 50%.
Normally on events I get between 320-380 karma depending on if its a gold medal or silver. Not once during the whole day did I see any karma gain of 400 or higher which would be expected with the boosters.