Telegram's billionaire founder, ‌Pavel Durov, said on Saturday that Russia's attempt to block Virtual Private Networks (VPN) triggered a problem with a domestic payment system, adding that tens of millions of Russians were resisting ​digital controls. Get full access to Reuters.com for just $1/week. Subscribe now.   Technology Roundup Technology Roundup   Telegram's Durov says Russia triggered payment system problem by blocking VPNs     Samsung Elec likely to report stupendous surge in quarterly profit to record level     China moves to regulate digital humans, bans addictive services for children     Kremlin's drive for a state-backed messaging app touches a nerve for some     Trump administration proposes expanding Chinese tech gear crackdown...