next time read at least your own 2 years old link, it was caused by him using VPN, if he switched off VPN he didn't need to login anywhere, so no, even two years ago you didn't have to login in vlsub unless you use VPN for some strange reason
> Add possibility to set opensubtitles.org username/password in config menu to avoid download limit to unlogged users
You can add this to the list of reasons you needed username/password for vlsub at some point, when you hit their download limit. Which is something that used to happen a lot with fansubs.