while the campaign manager nor the casino didn't tell you to talk about them in the post you are to make, they surely want someone who will do that. but you doing it will be like kissing asses.
This is actually usually wrong. No credible manager would expect participants to squeeze their brand into every discussion no matter how unrelated the topic is and there's only so many threads someone can make about a particular topic without being an obvious spam. Managers rather want users who contribute constructively wile staying on topic, their replies gets read more as other members expect quality from them and by extension the company is promoted.
Some brands favour spamming over actual organic advertisements and these are the ones who would require one to make threads about them or fix their link into every reply.