According to posts on online forums, ads have made their way into real-time gameplay in Assassin's Creed Odyssey. One gamer who reported the problem was Redditor triddel24,...
I wouldn't say I'm consciously boycotting Ubisoft, personally. But I sure as hell haven't bought one of their games for a long time, and with the way they've been going as a company in general, I can't see myself buying anything from them in the near future. If they do release something worth buying then I'll consider it, though.
My last Ubisoft title I didn't get for free was AC4 I think. Chose a good time to drop off. Like you I'm not boycotting actively as much as I hate their practices and they have shitty games that all feel pretty similar after a certain point.