[YurgenJurgensen]

The only two examples you listed are primarily gacha games though. If you meant to draw parallels between K-pop and gacha, why mention anime when they're never the primary medium? And even then, the real money still isn't in the goods, it's in getting people to waste their life's savings gambling for JPEGs.

[sekia]

Both of the games are based on anime franchise, though. Even aside from that, here in Japan it is not uncommon for enthusiastic anime fans to throw multi-thousand $ for goods (including fan-made "doujin" items), live concerts of voice actors/actresses, travels to model locations and so on. I don't see any difference between their mind and K-pop fans'.