Your mistaken, you always had to unlock them... but it just cost glimmer, why it wasn't a big deal.
BL required a currency grind like LF, except it was timegated. The currency grind is back but they removed the timegates on most of it.
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I would rather just pay glimmer than grind for this crap
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The fragments on stasis were shared between your characters. You still had to unlock stasis and the aspects on each character, but not the fragments.
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Maybe that's something that was added later, but I remember unlocking them for each character specifically week to week. You know how I'm 99% sure? My Titan was a week behind... I specifically remember that. Every week each character got enough currency to unlock a few. But since it was timegated, if you missed a week for currency on a particular character, that character would be a week behind.