% u . what is it?????

we all know that rooms are starting with the %u in there names
and i want to know wth is going on .... the room name keeps changing when your in the game and it acctually dose NOTHING TO UR ZP, GP and EXP. i have 4 explanations. A. z8games ( or subagames) was going to bring out a new event where for a week or 2
the exp, gp or zp was going to be boosted but somehow the patch went wrong and the boost dident happen so z8/subagames covered it up.
B. same as a acept z8/suba games dident stuff up but insted some1 hacked the patch
c. with the last patch someone hacked into it and made the %u hack
which will bug your computer andsteel ur data
d. its a fake hack from cf hackshack or another hacking site

you tell me

A, B, c or D