why is it that two tiers are unlocked simultaneously and not one tier at a time that's a good question I actually don't know I think it's just that you have more options to pick from so you don't feel like it's too linear you have like more it's like you're you are gated behind certain progression, requirements you still have a couple of options as to like what you want to unlock in what order like in the case for me where you know when I unlock the next phase I could go for the markv bells immediately by, buying it off like the option is there for those people, I think that's the way reason I can't say that's for sure the reason but that's that's how I that's my rational at least