Im' about to build a deck around The Yuggoth Contract and wanted to know the same thing.
I read this in the current errata and thought I could share it to save others the trouble;
"Conspiracy cards effects indicate if the effect is initiated upon winning the conspiracy. If they do not indicate the effect is optionally triggered upon winning, then the effect is a passive effect that is always active and resolves as indicated on the card. NOTE: Conspiracy cards are not considered to have a controller, and any instance of the word “you” or “your” refers to all players."
I read this in the current errata and thought I could share it to save others the trouble;
"Conspiracy cards effects indicate if the effect is initiated upon winning the conspiracy. If they do not indicate the effect is optionally triggered upon winning, then the effect is a passive effect that is always active and resolves as indicated on the card. NOTE: Conspiracy cards are not considered to have a controller, and any instance of the word “you” or “your” refers to all players."