I don't know how to use Imagur or what the other players usually use, however screenshots and scanned files are not able to be posted. Is there a way to post my Drawings with something other than Imagur?
I would suggest using Icecream Screenshots. Its a downloadable PC app that can do things such as screenshot selected areas, record footage, etc. Best of all, the screenshots can be saved to a shareable link, similar to an imgur page. It's my go-to screenshot and recording app. :3