Why are they not funneling all the profits into the creator of iOS, Android, Windows Phone, Webkit, and all number of other frameworks. The app wouldn't run wit

Why are they not funneling all the profits into the creator of iOS, Android, Windows Phone, Webkit, and all number of other frameworks. The app wouldn't run with out them. Rovio made the effort to market and capture the imaginations of people so that they want to spend money on the games, toys and t-shirts. This reminds me of pac-man from when I was a kid. I had a Pac-man birthday cake, Pac-Man clothes, Pac-Man Underroos, etc. I know my 5 year old son is obsessed with the angry birds as characters, and wants to know their back story. This is what drives him, not the framework used.