The text of Alliance says that you ignore the gold penalty to PLAY cards from a house of your choice: does it mean that during setup OOH cards cost 2 gold more for the OOH gold penalty?
I think this works this way, because cards placed face down during setup are not played, so the agenda will not apply.
So, looking at the different wording, do the other treaty agendas (for example Treaty with the North) allow you to ignore the penalty during setup?
I think yes, because the text is: "Treaty. Ignore alla the OOH gold penalty on stark cards. Each opponent without aTreaty agenda needs 5 fewer power (to a minimum of 10) to win the game" It doesn't talk about playing cards...