More of a technical joke because of the random gacha system that's in most japanese app games. FGO isn't the only one who has had jokes for rare characters holding google play cards or apple cards because they are so rare you'll be spending money on random rolls unless you are super lucky.
Most gacha system games has "that one rare character".
That's... even worse than I thought. I get that a lot of MMO or mobile games have gacha systems like that (and I'm the kind of prude who finds it anti-consumer to do that), but for entire characters? That just doesn't sit right with me.
You are telling there are games out there more evil that Love Live? And I thought spending 50 lovecca stones for only 1 SR, mostly Rs and maybe (just maybe) 1 UR was bad enough.