Just because they know doesn't mean they use it. It's impressive that a lot of them know about Bitcoin, but that's kind of expected given how much their government talks about it lol. They even plan on launching their own cryptocurrency. People will get curious at some point.
Either way, according to this site:
https://www.cryptocompare.com/coins/btc/analysis/USDRussian rubles is only 12th in terms of Bitcoin trading volume. We could probably bump that up to 11 because USDT doesn't count, and it accounts for 0.18% of the market. I know it's not a perfect indicator of Bitcoin support, but based from that, I find it highly unlikely that Russians are the biggest Bitcoin "patrons", as you say.