I can probably assume what happened. He posted his edit link to his kijiji ad on Max, a member or visitor took the opportunity to mess around with his ad, placing a Max signature(not cool, btw) at the bottom. Probably around the same day it was posted on here or around that date, a Max mod removed the post all together as it goes against our forum rules. Some people simply do not know how to use the internet and if they make a mistake(such as posting editable kijiji links), they resort to blaming the forum, community, e-commerce store or whatever site their on for their mistake...and life goes on.
Update: Looks like the OP in the Fanatics thread admit to his wrongful accusations. Unfortunate that he acted on impulse instead of learning a thing or two about kijiji ads/internet.