You talk about working “in Russia” as opposed to promoting online casinos to them, but I assume you mean the latter.
I’m not an expert but I’d believe there would be a good market for it. I have a russian friend who says it used to be chaotic, there were casinos all over (someone even put slot machines stand under a bridge). But the government has been really trying to control gambling and make it more like the US, where it used to be centralized in Las Vegas and Atlantic City.
No more casinos on every corner means more people willing to play online.