As of late last year, Spotify disabled the function of posting listening activity to feed on Facebook profiles. Please reenable this function, very lame without it. I want to share my listening activity with my friends!
I understand your frustration. After lots of thought and consideration, this feature has been made unavailable. I'll pass on your feedback to the right folks. For now, I recommend checking out this article to share music with your friends. Let me know if there's anything else.