I am in the same situation as you but as soon as you have caught up with the posts from friends (which if you only have a few hundreds and check everyday goes very quickly), it's literally only sponsored posts.
I just checked right now, I scrolled through 10 posts of accounts that I follow, which took 30 seconds, before getting "You're all caught up" and having literally only spam posts.
That's true, but I consider "you're all caught up" to mean "it's time to close the tab and do something else." Honestly it's really great of Instagram to provide a convenient stopping point like that instead of an infinite scroll.
