Funny, I see the opposite on Instagram - it's loaded with "suggested posts" based on things you liked, other accounts you follow, or apparently just things that you stopped scrolling for a second or two on, which I guess it detects. It even switches you to an endless list of suggested posts to scroll through once you have seen all of the posts from people you actually follow since the last time you opened the app - you have to click to an alternate screen/feed if you want to see an "old" post again.