I don't think POW is the best solution to spam. POW is to prove that the message it's attached to is important to you.
Not all social media has to be about "historical context" and "conversations". imo best use of social media is about sharing important messages with as many people as possible. Once the message is out there, people can discuss among themselves and make up their own minds.
So messageboard relays that can sort the signal from the noise
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I’m imagining a job board relay where old posts don’t matter as much and both employers and employees by posting on a particular PoW threshold relay can signal to each other they’re real and serious
Exactly
