There is 0% chance this has happened by accident. Someone ordered the developers to program for them to appear there, and that's exactly how they ended up there

whoops, one of our developers slipped on a banana peel and accidentally hit all the right keys, over the course of a couple of hours, to accidentally implement ads in the game

“We technically thought we would get away with this shit, which was an error. How pissed would you guys be about Coca Cola showing up in ancient Baghdad?”

The system we set up to show ads accidentally showed ads.

Getting caught this time:

When they inevitably get caught doing it again:

The later, during the executive meeting:

"it's easier to apologise than it is to ask for permission".

As in "We started a trial balloon, and your unfounded criticism made us take it back."

Rogue engineer strikes again.

Years back I was part of a focus group for VR and one of the questions they asked me was how accepting I would be of ads in game and well they got the most heated response from me with that one.

Yeeaaah, don't think I'll be buying any ubi games again.