Proton VPN will not be of any use if one is in a place like Russia, or China, or Iran. You know. I mean, there are a couple of ways to download the installer, but you won't be able to connect to any of the VPN servers as such a connection will be blocked by your ISP. The same applies to Windscribe and all the other popular options that everyone knows about.
Unlocator worked for me. Sadly, they only offer a two-week trial. Then it's either pay up, or create another temporary account.
Perhaps this will come as a surprise to some, but most people on this planet only have enough money to buy food and other essential things like pants and shirts. Parting with five or ten US dollars per month to get a premium VPN isn't an option for them. I don't think it's an option for me, either. I am a citizen of a comparatively well-off country, mind you.