>VPNs
Only residential VPNs work on 4chan (the same one used by sharty and dedicated shitposters). Iproyal is one of the best ones and very cheap (approved by /g/).
But you don't need VPNs. If they start blocking sites they will use same methods Russia used at the beginning before DPI machines. Simple WARP (anything that uses WARP) can avoid any possible EU block. Or they will use even more premitive methods like page swap.
Just google ntc.party site. It's dedicated anti-censorship slav site with all information about censorship. It's not slav only.