Wow, censorship in Russia at it's finest. It's just ridiculous. Following Roskomnadzor logic, they should ban Google too, because they had advertisements of scams. But I wouldn't be surprised - I remember they tried to ban Telegram, banned LinkedIn and many other websites.
BTW, I see that decision to ban Bitcointalk was made in 2071 and they banned it just right now. What a fast reaction!
I have no idea online gambling is illegal in Russia. But b;locking a crypto forum is a lot like killing the crypto information than the online gambling. There are lots of Russians here Vitalik and Sasha of Waves is Russian. Now they'd have to use VPN to access. Wouldn't stop them from coming here though Russian section is a big community.
AFAIK, gambling in Russia isn't illegal, there is so many online casinos and sportsbooks in Russia. But this one wasn't legitimate and it was reason of ban.
I'm sure that your mentioned people always use VPN or TOR to access websites including Bitcointalk, so this ban won't affect them. It mainly affect ordinary people. Offcourse, they can use VPN, but obviously, not all are going to do it.