You haven't added any guidelines, chooseusername.
As far as the image hosting is concerned, relevant free hosts seem fine; it's that pictures lose their relevance after a while and get deleted by the time you actually ask for them, and Google fails to find mirrors.
For Reddit's implementation, I can't tell what's its relevance to Git's capabilities. I'm only guessing though, as it seems that GitHub should let developers decide if the code snippet is relevant as it might feature a single code maintainer - but it mustn't be so.
Before dubbing anything wrong or right, maybe this is the time to advise first-time developers to bookmark RB Wiki when they find any reference useful and point how they should expand the wikis at their own comfort, and with usable information they've found on the web, after they've interpreted the source of information from an external website.
It seem best to me if time management is the main concern here.