Hoping for a little clarification on the 30th Anniversary pack. I purchased the full Witch Queen + 30th Anniversary pack via steam as it's my primary platform. However, I do sometimes play on PS, so I bought the base Witch Queen option there since I am assuming that Seasons will continue to transfer across platforms. With that said, will the 30th Anniversary pack need to be purchased on each platform, or will it be handled like a season where one purchase, regardless of platform, will suffice?