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.
Searching for it is good to and most casinos I know is not crypto based. Most casinos are traditional which accepts other cryptocurrency as well. Maybe op don't have to focus on bitcoin only casinos even the new casinos that are newly launched are not bitcoin only casinos.