[dredmorbius]

I cut / you choose works in some situations.

In others you'd want, say, auditing or independent third-party verification.

In this case, perhaps an audit involving the deliberate injection of a mix of legitimate and bot traffic to see how much of the bot traffic was accurately detected by the ad platform. Rates on total traffic could be adjusted accordingly.

This of course leads to more complications, including detection of trial interactions, see e.g., the 2010 VW diesel emissions scandal: <https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal>, or current AIs which can successfully identify when they're being tested.

[dredmorbius]

On further reflection: I'd thought of raising the question of which situations cut/choose does work. Generally it seems to be where an allocation-division decision is being made, and the allocation is largely simultaneous with the division, with both parties having equal information as to value. Or so it seems to me, though I think the question's worth thinking about more thoroughly.

That's a subset of multi-party decisionmaking situations, though it's a useful one to keep in mind.

[VBprogrammer]

I vaguely remember someone winning a noble prize for economics for coming up with ways to apply cut/choose in financial transactions but I couldn't find it in a quick Google. It may have been nearly 20 years ago though.