I think it's got a certain "cool" factor. For some types of content in some cases it might also make sense, almost like a slideshow or paginated document, allowing each jump have its own self-contained focus.

For example this page has action buttons and community links with a video on the first page, a written blurb about system configuration on the second page, screenshots/visual showcase on the third page, etc.

Personally I'm on the fence. I think it probably more often than not tends to be annoying, like most overrides of default conventions, and feels more like you're being force-fed marketing instead of reading information. This specific page would probably work just as well if they kept the sections, dividers, and even the animations, but just let you scroll naturally.

But then, maybe it gets them more downloads or something.