Also who had, any luck promoting Bitcoin Only Casinos?
What do you mean by promoting bitcoin only casino? I really can't think of any casinos that only accepts Bitcoin most of them wanted to maximize their capabilities in accepting crpytocurrency on their platform. In case you are looking for crpyo based casino that is pretty reputable you can just use your search engine and the list will pop up.
He owns the website so it's an advertising related. The promotion that shall be on his website and he'll create a review for it.
There are many bitcoin-only accepting casinos if you take time to search it on this section.