2x EXP Card * 2x EXP Event * 2x Entitlement EXP...

I'll assume it's a typo til I see a statement from Nexon saying not to do it. If sitting out on good experience because you're a goody two-shoes makes you feel empowered, then right on. If taking part of the best experience possible without hacking makes you happy like the vast majority of people, then until it is deemed bannable, right on.

I enjoyed my 8x this weekend with onyx apples courtesy of my friend and training partner for those who care.