4 months is really nothing compared to goliaths in the casino business. Most of them have been around for years now and they have built that number up because they were one of the first, now there has been hundreds of casinos since those first ones came up, so of course people are sticking to the old ones instead of trying new ones which sounds risky to them.
Yes, we are getting some users and I love the fact that mintdice team cares about marketing because that is the most important part of running a casino but do not expect it to be huge all of a sudden. It will take some years to become as big as the other huge ones, which is expected because how can a casino be in existence for 4 months and be great when there are ones who have been around for 2+ years, so it will take time but it will get there.