Blah, they won't make me pay like that. If i wanted to pay to get them, i could just pay for some e-gacha/sr-gacha tickets or consumables or whatever to win them during the events they were in. And they will definately not make me want to pay to get (to get a chance! to get, to be percise) something that i should've got for free if they won't mess-up the requirements to get it, like Gambit's 50k SR card. So in that case that would be just another useless feature for me, like medal shop, and just another way to make big spenders to spen even more, if they are obessed collectors, and started playing late to get those cards in the Events they were bound to.
But you are, probably, right, since otherwise they could've just add some old cards to e- or sr-Gacha or to GHQ. (
But, well, we'll find that out in half an hour... (so i won't even go to bed, no matter i'm up for over 18 hours already)