I have a question regarding to the 90 day sub. I don't know if this has been asked yet but yea.

When you order the 90 day sub through mog station, do you have to pay the 3 months in advance/in 1 go (which is 45 ish euros i think)? or does it work like some sort of contract where it charges automaticly for a period of 90 days? which means it charges 12 euros a month for a period of 3 months then stops?