Pubby has read the information in his QT, realized that some players are "allies", whatever that means, and obviously has reason to believe that making these players aware that he is also an ally is beneficial to his win condition.
It's easier for me to envision a scenario where town or third-party pubby does this than a scenario where scum!pubby does this, but I don't have enough information yet to rule anything out. If pubby is town, I trust him to have weighed the potential usefulness of scum knowing this vs. the potential usefulness of the relevant town player knowing this and judged the claim to be worth it.
If pubby is scum, who knows some town players are allies and wants to draw them out, I think he would have approached it differently. He doesn't seem to me to be pushing for a claim.
I don't see a huge amount of value in speculating about this beyond how it affects our reads of pubby.
PPE: ADK