I am surprised that GOG is still selling to other regions, the Russian/CIS pricing workaround have been used since GOG introduced regional pricing, and it is openly discussed on their own Reddit and on their own website. It is also discussed on Steam. They know, but clearly don't care, and some are in the opinion that it due to CDPR being anti-DRM and allegedly 'pro'-piracy. They should localise all pricing to the Russian/CIS region.
Steam, Origin, Ubi, Epic, etc. have all patched this workaround. Steam will even suspend your account, pending, but the Steam Marketplace is essentially a gambling room. Naming Epic, it was priced on Epic $29.99 not too long ago, but the price has since changed and SA is a pricing region now.