If you don’t have this kit you will be bombarded to Temu’s ads
Better version: https://lemmy.world/post/21245770
Proton acquired Simplelogin (or partnered?) so it’s one and the same. There’s a chance you may be able to get more aliases by using both the simplelogin and the proton accounts though…
The limit for Proton itself is so generous I haven’t needed to. I have an alias for almost every single online account I have, and it’s all built in to the password manager. Very handy.