It's true that the commercial and gaming guidelines are clear -- but the gaming guidelines have until now been interpreted (and applied by Vimeo) as relating to

It's true that the commercial and gaming guidelines are clear -- but the gaming guidelines have until now been interpreted (and applied by Vimeo) as relating to fan-made playthroughs of games, not videos uploaded by independent game makers of what they're working on. Applying those rules to the game creators is the recent decision. [Edit:] Since this wasn't made clear by the linked article, Alec Holowka (Infinite Ammo, from the takedown screenshot) is an award-winning independent game developer, which is why people are upset.