Jesus, finding out you can only sell gems dropped from the cash-shop epic emblem thingy - and only one specific type, the other that are parts of bundles don't allow dropped gems to be sold - is fuckin hilariously gross.
I expected the usual gross mobile monetization despite Blizzard still pretending they're not a soulless corpo or something, but this is arguably the most aggressively and shadily monetized mobile game I've ever played in my life.
Which is a shame, because the core game is pretty bloody great with solid production values. They've just locked the whole point of playing - farming loot and getting sick drops - behind massive cash walls asking players to spend hundreds/thousands a month.