It's not a question of whether OgNasty can promote Betcoin; anyone can. It's a question of whether he should.
What with Betcoin's history being dodgy at best it can very easily give people (especially newer members) a skewed impression of a company's trust and ethics should someone as trusted as OgNasty advertise for them - especially so whilst using words such as "The most trusted Bitcoin and Litecoin Casino".