Not just product placement, and not just "today" either. I can recall so many cartoons from my childhood in the 80's (He-Man and G.I. Joe come to mind) which were nothing but long-form promotional content aimed directly at kids.
I recently watched a couple of episodes of Street Sharks because I liked it growing up and wanted to have a bit of a nostalgia binge. The whole thing is an ad for the toys.
