Board Thread:R2D - Questions Board/@comment-25083667-20150216055906

I am very confused by this. Took me a long time ro rank from 18 to 19. I did not play as much during rank 18 but boy did it take awhile. I was not bothered by it until recently this month on february where I have ranked up finally after approximately half a year as a rank 18. Killing thousands of zombies while I was rank 18 barely did anything for me. Winning games however I did not aim for as much so I guess that may be a key factor for xp. I did not use boosters and such so will someone please enlighten me on how in the world did some maniac rank up to max so fast while I was stuck in rank 18? My first guess is...xp boosters and mlg chainsaw rekt zombiz 24/7 camp ze heli killin within a 5 stud radius and finally win ze game. 