I disagree with almost everything listed so far because while many those things are shit (paid online play, MTX, "deluxe" digital pre orders, etc) the consumer knows what they are getting. If they see value paying 10 USD for a skin, that's on them. I personally only roll my eyes, but I don't think it's a scam if they tell you what you're getting
For me it's worse when things caught you off-guard, when things are sold in clear bad-faith or when the sense of presumed consumer fairness is broken. Exemple:
Shutting down digital stores. They should be open for as long the companies exist. If they don't want to sell games anymore, there should should forever keep the option of download your game and additional content
Low quality controllers (or any peripheral), created with obvious obsolescence in mind. Breaking twice or thrice in 7 years, so you buy a new overpriced controller again as many times as you need to keep playing your own library
I think a case can be made for Gachas and loot boxes, because they are something more akin to casinos and are extremely dangerous for kids and teens because they can be rather addictive, so I'm either convinced they should be regulated to not be played for legaly minors or outright banned as an industry practice
Releasing obvious "early access" broken games without telling you you're essentially doing free QA for the developers. They fuck even CHARGE you for doing the QA and tame months and months to your game be in an acceptable stage. The only saving grace for this is reviewers and streamers can test the game for you so you can decide whether it's a game in a playable state before buying
