It is called a drive-by offer, a basic scam that is often effective in picking off some newbies landing on this forum while actually searching for miners and buying them. Random threads like these get picked up by SEO and then they ignore every post written after the OP.

It is actually very profitable for scum like them to run a scam and the added advantage is the lack of information and lack of doing research on part of the newbie who might read this thread and ignore these posts and text the OP right away without thinking what is too good to be true is essentially a scam.