Imagine paying 70$ for a f2p mmo where you always just play by yourself but you get banned if you cheat

It's the standard Blizzard approach to do that, they used to do the same thing in WoW. I hope they do look at how many times someone's done it. If they've only done it once (or maybe twice), maybe just give them a warning. If more, then consider banning them.

It's pretty common for online games that have player-to-player trading systems. The developers are usually very protective of their in-game economies, because while they don't officially support grey markets, they know that the existence of grey markets is the sole reason a huge chunk of players (often whales) play their game in the first place. It's in Blizzard's best interest to ensure that there isn't in-game inflation.

Same reaction, once Baldur's Gate 3 was out I haven't touched this game, and probably I'll wait for a couple of months until they fix the mess they have

I'm really glad I never really developed an interest in Diablo. Correct me if I'm wrong, but this is supposed to be the same sort of genre as Minecraft Dungeons and Torchlight, right? Not some weird fucking pretend MMO where disabling features at players' expense is just okay?

Activision-Blizzard's obsession with stripping player freedom out of their games is suffocating. This franchise used to have mods, now you're not even allowed to trade if they find out that people who don't want to grind are duping items.