- Google Image Search removing the ability to go directly to the raw image after Getty complained that web users are bypassing its website and therefore not generating traffic
- Facebook removing chronological feed
- Facebook showing you pages that you never followed on your home feed without the ability to turn this off
- Microsoft trying to introduce ads to Explorer and the start menu
- Microsoft making it difficult to create a local Windows account by making the process unintuitive, leading the user to believe that a Microsoft account is needed to use Windows
- Apple dropping support for iOS web apps because it doesn't want to support browsers other than Safari
- Reddit and Twitter's ban of third-party API use that killed nearly all third-party clients
- EA producing games that require users to be always online, despite the game being single-player, presumably as a DRM measure
- Ad companies making it easy for you to give consent to data sharing and selling but really difficult for you to opt-out
Edit: More examples