Um... but that's exactly like any OTHER sales method no?
For example, someone goes to Fameshed to purchase a (hypothetical) living room from Aria (for example)
You get the table for x, the chair for X+10, and the couch for X+100. Or the full pack for X+1000.
So if you pay more for rarity, you'd pay more for the bigger item with more anims, or pay even more for the "fat pack", which ends up being... kinda the same thing, just less complicated?
Really... human nature no? Why simplify if they can complicate? XD
Most people just prefer to pay (supposedly) 1000 for a (hypothetical) bed, that was once a rare gacha item and now is being sold as a copy-mod item, over paying 1000 for 10 items they do NOT want and will clog inventory, or be resold on MP or that gacha sim, and never get the damn bed in first place.
It's all very simple and very logical. You get to pay a fair price for that copy mod thing you actually want, over paying a lot for the CHANCE to get that, but going home with lots of things you don't even LIKE.
Maybe it's just me, but I like simple, basic, steady things. I like to see the item and buy. Pay a bit more, but I get to go home with what I want and some change in my pocket, instead of going home with arms full of stuff I don't need and completely broke XD