There are 24h in a day. Divide your number by 24 and it will roughly match.

Germany also has their own for official accounts: Social.bund.de

I would like to replace iCloud mail. But I heavily use their „hide my mail“ functionality where I can create as many randomly generated aliases as I want. Is there another service like that?

I guess they are just going to make the UI suck so much that you prefer to not touch it with a 10 foot pole.