alt Hacker NewsIf you are in the US, have you considered suing them for robot.txt / copyright violation? AI companies are currently flush with cash from VCs and there may be a few big law firms willing to fight a law suit against them on your behalf. AI companies have already lost some copyright cases.
Based upon traffic you could tell whether an IP or request structure is coming from a not, but how would you reliability tell which company is DDOSing you?