Google (image search) and Facebook (news feed) have both done this. Last time it came up I was able to find a screen shot of one of them but not the other, let me see if I can dig that up.

I don't think they did it deliberately, but I'd bet someone said "We could increase engagement if people didn't have to click anything to keep seeing more content" and nobody bothered to think about other design consequences of automatically expanding the content downward forever.

EDIT: A screenshot of Facebook's in mid-2013 is shown here under the "Unreachable" header https://www.smashingmagazine.com/2013/05/infinite-scrolling-...

Or straight to the image: https://cloud.netlifyusercontent.com/assets/344dbf88-fdf9-42...

I have seen this multiple times. It's almost certainly out of ignorance, and not intentional. Just someone trying to implement a slick UI without really thinking it through.

Not evil, but stupid.

Old Navy does this. There's a limit; 3 or so "loads" finally gets you to the footer.

https://oldnavy.gap.com/

Plenty. Most likely because they first have a footer, then someone says "MUST IMPLEMENT INFINITE SCROLLING", and then you get that.