Again, these kinds of transactions have been the norm for a while now, no matter where you look. It's been in MMOs for ages, it's creeping into mainstream games like COD and Overwatch, and it's what keeps mobage afloat. Some people value virtual waifus that come with cute attack animations with HCGs, some would prefer to marry their shipgirls, some want the hottest/most broken unit in the game, etc. Extend that to people who buy figures, dakis, and whatever else on your shelf and in your room that looks pretty but doesn't actually do anything, and it's not hard to see a connection.
Or like Rupturez says, take-out and beers only provide a few hours of satisfaction at best, but people do it all the time anyway.
And this is going to very quickly approach the slippery slope of "how is any hobby *worth* anything", so we'll leave it at that and go back to how bad of a deal this is, even if you like some good-old Wazakita art.
That makes more sense. I mentioned before how a few people were complaining about the $15/$30 skill/dressblooms in the shop being too expensive, and considering that golds were recently priced at $30 in a step-up, and rainbows are typically $50/$60, paying half that or a little over half that for essentially half a dupe isn't a bad deal at all.
But some people got used to the Black Friday sales and were somehow hoping for $5/$10 blooms instead, which if that happened would just fuck with our perception of a gold/rainbow's given value and hurt sales in the long run.