If AGI was around the corner, they wouldn’t have to resort to what some consider a scummy way to make money. They’d would become the most valuable company on the planet, winning the whole game. Ads show you they don’t know what else to do but they desperately need money.
There are costs to doing ads (e.g. it burns social/political capital that could be used to defuse scandals or slow down hostile legislation, it consumes some fraction of your employees’ work hours, it may discourage some new talent from joining).