Spoiler (click to reveal)
During the most recent game we unlocked income buildings, specifically the one where the income is a card from the advancement deck.
Suppose I have an influence marker here, and when income happens I take a Friend card. I also have the Brewer who says "Whenever you use a building to gain a friend card, gain 1 VP and $1"
Does the income from the building count as "using the building" and thus trigger the Brewer? I'm guessing no, but I've been wrong before about these interactions.