You can't possibly understand this unless you sharpen your thinking. Do you think the highest networth individuals would just bombard the exchange without internal marketing and politics? Then you don't understand the gimmicks embedded in such an arrangement.
Have you even studied the Ts&Cs to warrant your assumption of taxes?
It will be only for them and not for anybody else. There is no need to read their ToS; their highly valued individuals have already done that since it will be their playground laundry machine. Highly valued or not, I would never join a CEX controlled by the Government, so I don't give a single sat what they will do.

Perhaps you should understand what you replied to, you just didn't get the gist. By evading the Western sanction, I mean the Russian government itself, it's easier dealing with their government-backed/controlled exchange with big volume than with external exchanges that can suddenly do the Western bidding.
And trade what? BTC for RUB? And they will create the high volume by themselves and earn from each other, like a tennis game... Good luck with that man!

Maybe you should think differently about what highly valued ppl gain, from where, and into what assets.