In addition to the Double Agent achievement, every buy BNS gold person in the group, after completing both sets, will have 2,000/10,000 player kills. This will not only allow them to purchase the veil that hides your name/guild at the misteye woods faction vendor after 1,000 faction kills, but will also give them 250 pierce from completing 1,000 kills.

There are also achievements for dying 1,000 times, rezzing people 1,000 times, and helping someone meditate 1,000 times. This will get you pretty far along in those achievements as well.

As far as making things "stupid and dull" I disagree. I just want to get this particular achievement out of buy BNS gold the way so that I don't have to suffer the negative effects of changing factions later.

Blackram Supply Chain

Infiltrate the Blackram’s home base and break their grip on the Eastern Continent.

The Blackram Marauders have been a buy BNS gold curse upon the Earthen Realm for generations, using their mastery of the sea to freely terrorize both the Stratus and Talus empires alike.