Q:
Boosting karma jugs: bug / exploit or intentional?
Community Coordinator
A:
Hello Paradox.
Working as intended. 
Q:
Several ppl I know (some of my guildies among them) are worried that using a karma booster before quaffing a month achievement’s load of karma jugs (or even more) might be considered an exploit. I searched and it seems a well-known fact that the boosters do indeed boost the jugs (as do guild banners), but I can’t find anywhere whether or not Arenanet considers this to be working as intended or indeed an exploit.
Could we please get an official statement on this?
Community Coordinator
A:
Hello Paradox.
Working as intended. 
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