I’ve actually had this thought for awhile.
If people could subscribe to your Mastodon feed via email, then you’ve greatly increased the network effect of the Fediverse.
Yes, I know that you can do this via RSS but why not email too?
Not everyone uses RSS but everyone uses email.
If frequency of Mastodon messages is a problem, just send a daily email digest once a day.
If we only include modern technologies, then the Fediverse only has 12 million users.
But I also think that email, NNTP, finger, etc. should be considered part of the Fediverse.
If we consider *everything* federated as part of the Fediverse, then the Fediverse has billions of users.
In fact, it’s weird to think that anyone would not be part of the Fediverse.