They were working before because Steemit was proxy-hosting the images, but imgur.com disallows inline images on Steemit, so they're not being displayed right now. You can rehost on https://imgsafe.com and they'll work.

Welcome to Steemit! Check out my photos here https://steemit.com/active/pfunkphotos Most of the ones I've posted were shot on b&w and self-developed.