Do 7-11 cards stack with normal 2x cards/events?

Just wondering. I'm planning to cheat on my Pirate and abuse the 2x event on Demethos, and I might buy another 2x card for 4x exp. So yeah, would a 7-11 card stack with that for 8x exp?

No 8x EXP but 4x EXP yes.

so... demethos has 2xp? right and can i stak the 2xp from demethos with 7-11??? making it 4xp?

That would be correct.

New Server x2 EXP + x2 EXP Card = x4 exp.

Also

New Server x2 EXP + x2 EXP Card + x2 event EXP = x8 EXP

The 'New sever with x2 exp' is a con to get people to buy more x2 exp cards.