Are +X gold, +X initiative or +X influence also the text? I mean: does the card also cause that those incomes/bonuses expressed in symbols (coin, scroll) also disappear?

ed00011 said:

I think so. As per the FAQ

(3.9) Icons in the Text Box
Gold modifiers, influence, and initiative modifiers
are not called out with an outline, and are
therefore a part of a card's text box. Challenge
icons and crests are differentiated from the text
box of a card by a solid outline, and therefore
are not considered a part of that card's textbox.