This question just came to me while I was buying a subway pass. It’s priced very well, provides a very good service, doesn’t suffer from enshittification, and its price increases very rarely.
What are some other services which people don’t mind subscribing to?
I use the mail service included with the domain at Bookmyname, they give you 2GB that you can split between multiple mail accounts, and unlimited aliases that can also send (they are called Identities in K9mail and other programs, you have to add them to send).
The aliases still end with your domain name - for more privacy you can nest them for example one alias to receive simplelogin mails, another for 33mail, ecc.
BTW mailbox.org is a great choice too, probably simpler to use but it costs a bit more.