It's not the same though. Fastmail allows a@fastmail.com and b@fastmail.com going to the same inbox. It's also easy to create these aliases. You have revealed

It's not the same though. Fastmail allows a@fastmail.com and b@fastmail.com going to the same inbox. It's also easy to create these aliases. You have revealed your real email using the gmail plus sign feature. It's not that difficult for the people selling the emails or the spammers to remove a plus sign and some characters after years of knowing this.