My grievances with Proton

Yes I do the same but using addy.io. I would add the following benefits as I see them: * for sites which (annoyingly) use email address as login ID a dedicated email address adds a bit of extra security. * if a contact starts spamming or if you stop using it you can easily block it * you can block notifications by alias which is good for contacts which send a lot of spam but you don’t want to block. Or if you only want to get notified by your most important contacts. * for sites used only sometimes (eg agoda) you can leave them deactivated while you aren’t using them and avoid interim spam.