

lol. Not sure where you think you saw an ad campaign. If anything I saw the public spontaneously boycotting way faster than the average government based ad campaign could have been arranged. If there has been any campaigns (and again: I am aware of none) then it was after the public already started boycotting by themselves. Source: I live in the EU and saw this happen and had conversations with people around me about the boycotts too.
Plenty of people try to boycott anything by US brands. So I would assume that plenty of people who are boycotting also stopped drinking Fanta. But the thing is because this is more of a movement originating from the public not everyone does research in equal amounts. Fanta is likely less obviously US based to most people compared to Coca-Cola. So if I’d have to guess it was probably boycotted less by comparison.