Are there any services that you’ve encountered that don’t allow account creation with alias services or certain other domains like say protonmail or tuta etc? The ones I’ve encountered are lichess and google.
If yes, then please list some as to I can note them or keep in mind regarding them
Even Notesnook blocks signing up using simplelogin aliases. Some websites see it as a source of spam and may not want people to create multiple accounts using simplelogin aliases.
Both Filen.io and Notesnook did not allow me to sign up using my addy.io alias with the domain @anonaddy.com. I do not know if they block the other alias domains for addy.io.
Notesnook does not allow to signup through all simplelogin aliases generated in its free tier , it will give an “invalid email address” error. This has been even confirmed in notesnook discord community.
You might use your own custom domain with simplelogin to sign up.
Keep in mind that SL uses several different domains when generating aliases. So, it may be possible that one domain is not working, but another one can work.
After trying to open 3 issues across 2 different accounts created using different SimpleLogin domains, I think that GitHub silently restricts accounts created with aliases.