What does per creation mean on FilmReroll's Patreon?

My spotify wrapped says I was in the top 14% of listeners for film reroll so I figured I should become a patreon subscriber at this point seeing as I enjoy the show so much. I'm a bit confused about the tiers though. I subscribe to another person's patreon and the payment says X amount per month but Reroll says per creation. Does that mean every time they release an episode, so if they release 2 episodes in a month you would get charged twice that month? Or is it per campaign, for example, Aliens has multiple parts but you would only get charged once?