Would the extra gold given by the Black Raven be considered a gold bonus, i.e. would Knights of the Hollow Hill negate the extra gold?
Black Raven: ". . . Each player takes 1 additional gold token when he or she counts income."
Knights of the Hollow Hill: ". . . Other cards you control do not provide a gold bonus. . . ."
I'd say it's an effect that let's you take additional gold, not a proper gold bonus usually represented by the coin symbol, and thus unaffected by the agenda. But someone asked this over at agotcards.org and I wasn't 100% sure.