Premiere Membership/Promotions

I’m currently on the 8 classes/month membership and have been debating going to the premiere membership for a while but have been waiting for a promotion. This month has so many cool things and tempts me even more haha. If I were to pay for the unlimited and a promotion pops up in November would I be able to switch for the promotional price or would I be stuck at the usual premiere membership price? Just want to make sure, sorry if this is a stupid question.