Basic XP booster not 7 days?

[[FD]Fred]

Hey guys, sorry the the wierd title, couldn't find any good one.

But here is my question: why is it possible to buy 7 days Supreme xp booster, 7 days Boosted xp booster but not 7 days basic xp booster! i was just wondering because i wanted to stack 300% xp booster but then i found out that u only can buy 1 day, 1 month, 3 month's, 6 months but not 7 days? <-> maybe EA could make it happend? what do u think about that?

-Wacco ◐‿◑