I don't think that dishonesty is meaningful in this context.

Certainly it's meaningful. If Eliezer lied to us about the rules of the game and about what he accomplished, that'd be dishonest of him. You may argue in favor of such dishonesty on utilitarian grounds if you will, but please don't doublethink your way out of proclaiming it dishonest.

People playing the game believe that they cannot be convinced to report that they let Eliezer win without saying how.

No, the statement about what they believed was different -- that they couldn't be convinced to let the (role-played) AI out of the box. Not just they couldn't be convinced to report a false claim.

Don't be disingenuous please. Truth is different from falsehood, green is different from blue, and "I convinced people to let me out of the box" is different from "I convinced people to lie about letting me out of the box".