The question really is why don’t people properly embed images into their posts to better drive traffic to their destination of choice? As to the other question…what was the question? couldn’t help myself, sorry.
Do keep in mind some folks, right or wrong, are just conversing. Internet forums and social media are different then search engine results. If you really need to ask then you need to prepare yourself to sort through all the “search” results that do not give you the answer you are looking for. Computer algorithms likely provide better answers then humans.