Did the tip you received put a link to the Craig's list add? If not that is the difference as direct links are not allowed. I got dissed for putting a link to something in Anvil fire, not knowing Anvil fire does not allow links to their site. All the hullabaloo is about putting links to sites that are advertising stuff for sale like Craig's List, Etsy, eBay, Amazon etc. which are not allowed like it or not, I see the reasoning behind the rule.