So how does the guild Rare Drop booster work?

it says +1 on my current guild level so what exactly does that mean and apply to (obviously rare items but aren't xtals counted as super rare or am I just imagining things)? I'm not so eager as to think that Aso would put +flat% on anything that inst bought with orbs. I'm just looking for clarification before i possibly waste guild points on something like this.

 

Xtal is rare drop. The flat percentage works on base so if drop chance is .0001 it'll become .00011 if u do 10% rare drop boost lol

 

So the rare drop booster acts as 1% of base not a flat 1%.

 

I think its a flat +1... On the dice roll at least....

So if its a 1/100 it becomes 2/100 and if its 1/1000 it goes 2/1000...

 

"drop boost" works the same as drop up skill and books.
"rare drop boost" works like drop gems.
(just like the "rare drop gem" which raises base to 1%. not that it would have a noticable effect )

 

Wtf lf guild +3 guild booster . Wonder whats the effect with nightmare's/ultimate's x3/x5