A combination of paid relays, WoT and NIP-13 seems to be enough to block any kind of spam. All 3 increase the cost of a spam attack, each in it's own way. What we need is more clients implementing NIP-13.
paid is NOT main thing here cameri other are working on FREQUENCY based filters which only apply to BOTS scipts
ok great, so you limit the frequency, what happens? bots can go just as fast as a human meanwhile nothing changes other than humans are penalty. just look at the damus relay for example. 6 events a minute and no way to increase for legit use.