Like proof of work? I like the open relay idea.
We have pretty good filtering scripts at this point, proof of work is a bit of a dead end.
Why doesn't hash cash work?
Well in that case it is fine then, just use those scripts. I like the ides of there being some open relays you can just post to, and if scripts exists for filtering then there is the solution.
Which scripts?
https://gitlab.com/soapbox-pub/strfry-policies
Looks like the old shapeshift logo