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SHSS | 1 days ago (raw) | root | parent | reply | flag 
 Or you can use signal or simpleX. 

We already have strong cryptography. No need to add pow to messaging. POW is just how we determine who gets to update the ledger.
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MachuPikacchu | 1 days ago (raw) | root | parent | reply | flag +1 
 Cryptography doesn’t prove the sender expended energy.

You can require the message be encrypted but the sender could’ve sent 100M emails. If your service requires PoW then it prevents a denial of service. You can also require requests to be collateralized with bitcoin so that the attacker needs to think twice. If they send to a honeypot they lost their corn and got nothing in return.

Forcing the messages to touch the chain severely restricts the volume of requests and also leaves a public audit trail. Again I’m just speculating here and honestly don’t have a clue what he’s trying to do but there might be something there.