I'm not religious, and I have no objection to gambling as a form of entertainment. I do object when it becomes an addiction, and people are hurt by it. I don't gamble myself, so I would not advertise a gambling service.
Here in the United states a lot of Muslim Arab immigrants (including some members of my extended family,) run liquor stores even though they don't drink. It seems hypocritical to me, but who am I to judge? Promoting gambling seems like the same thing to me. If those selling alcohol can reconcile their religious beliefs with their business, I don't see why one promoting gambling can't do the same.
But since you brought up the concern, it seems like you already have some reservations about doing so. I'd say talk to other member of your religion whom you respect, your family, friends, and your Imam, and proceed in the way that fits best with your beliefs.
If you don’t gamble and will not advertise a gambling site like you proclaim, then I suggest you shouldn’t even be on a gambling forum in the first place. What about the campaign logo you carry, or isn’t that also an act of hypocrites’? Truth be told, we can’t always do all what we preach, and we don’t always preach all we do, circumstances and hustle makes some people find themselves where they would naturally never want to be.
I use myself for example, I don’t gamble but I am a strong promoter of gambling, reason because I get paid, and also that I do not gamble does not make it wrong, I might have personal reasons why I don’t do that and that shouldn’t stop me from promoting it and after all, in all promotions, we always advise players to play with caution to avoid suffering addiction at the end.