Don't Fastmail aliases already work the same way? That's $5 a month for 600 private email addresses, which (for me at least) is more than enough to cover all o

Don't Fastmail aliases already work the same way? That's $5 a month for 600 private email addresses, which (for me at least) is more than enough to cover all of the services I use. Unless they're easier to re-associate with your main account for some technical reason I'm not aware of?