If it comes to keeping contact information in order, that is something that only consumers can do; it would be pretty creepy if Corpos knew my new email address without telling them.
It has nothing to do with what i think about 3rd party launchers. Those are 2 different things, no need to get personal.
I don’t know what VPN you use, but i have zero issues running Proton VPN and accessing catbox. Maybe some VPN nodes are used to attack Catbox and they are temp banned?