I am somewhat of an active user of Ask Ubuntu. As I've been editing other peoples' posts (to improve them or something else) I've noticed a pattern... Users with below a 100 reputation used links to post images and those with above a 100 reputation posted visible images.
Out of curiosity, I created an alt account (don't worry, I deleted it afterwards) and made a question draft, and dragged a picture... it said that you can only post images above 10 reputation... and there was my answer for why there was this pattern (the users who got 11-99 reputation must have stuck with it). But what is the reason for this?