Lol...the OP can't really be this desperate for attention right?...right?...*hopeful glance*
It's not retroactive. Although I noticed that while grouped with my girlfriend of the same guild, we were getting two critter kills per critter. So maybe if you had a group of 5 guild members or more, it would be 5xcritters killed. Which would work well in maybe Borean, with the million penguins.
Closed this thread because it got out of hand extremely quickly.