"Am I making a post which is either funny, informative, or interesting on any level?
I hate how Reddit mods ban any post they don't like as being 'low effort / shit / spam' when it is completely vague.
If a mod on one server doesn't like something I say, and they delete my comment, all the other (well-behaved) federated instances will also delete my comment.
Of course this also creates problems in the other direction, like servers that ignore deletion requests.
That combined with a large amount of blocked instances across the board, I feel like you get into this "which direction would you like to piss into the wind" situation where you have no idea how many people/instances will actually see your message if at all.
Sending an unsolicited email to a random person X requires you to pay a small toll (something like 50p).
Subsequent emails can then be sent for free - however person X can “revoke” your access any time necessitating a further toll payment.
You would of course be able to pre-authorise friends/family/transactional emails from various services that you’ve signed up for.
This would nuke spam economics and be minimally disruptive for other use cases of email IMO…
These are one of the main culprits of unwanted emails... and a toll system would make them all the more valuable for the even worse actors to take advantage of.