Until either image uploads or an embed method for a Link Post that is an image, the (interim) method is to create a Discussion post and then use the markdown for displaying an Image.   Described in this post: 

*Request: Image Posts*
https://stacker.news/items/51960

There's also a nuance with the upload sites.  For a link from a site like Imgur, or Postimages.org, ... the link to the image itself would be what is used.  For example, the Imgur link for an upload (e.g., https://imgur.com/a/tcCorJh) won't work, but the link directly to that upload's jpg image (e.g., https://i.imgur.com/NxhUIBJ.jpeg ) will work.

`![Bullish Halloween](https://i.imgur.com/NxhUIBJ.jpeg)` 

![Bullish Halloween](https://i.imgur.com/NxhUIBJ.jpeg)

cryptocoin

I had issues with imgur thx to my VPN. Imgbb worked fine

faithandcredit

Daily discussion thread

saloon

Where do you upload pictures to post on Stacker News?
It seems most common sites (imgur, ...) do not work...