> I realise you are making assertions for which you have no evidence.

We do have evidence, which is their current behavior. If they are happy ignoring robots.txt (and also ignoring copyright law), what gives you the belief that they magically won't ignore this new standard? Sure, it in theory might save them money, but if there's one thing that I think is blatantly obvious it is that money isn't what these companies care about because people just keep turning on the money generator. If they did care about it, they wouldn't be spending far more than they earn, and they wouldn't be creating circular economies to try to justify their existences. If my assertion has no evidence, I don't exactly see how yours does either, especially since we have seen that these companies will do anything if it means getting what they want.