Do you know why GT was cut off so soon?
Because fans hated it, meaning TV ratings were low, meaning less money for Toei. I mean, Akira Toriyama didn't even work on it. That's why it's crap.
Originally, Dragonball was meant to last until the Frieza saga, with Goku dying on Namek. Fans wanted it to continue, and thus you got the sagas up to Cell (which was IMO a good decision). There Akira wanted to "pass on the torch" to Gohan, you could see that by the fact he turned SSJ2 and Goku died (again, haha). Fans wanted it to continue, again, you get Majin Buu saga. Gohan was meant to win (with his mystic upgrade), but fans shouted for Goku to come back and that's why there's a real ****ed up ending.
So Toei wanted to continue milking the Dragonball concept, and you get GT.
Is Dr Pepper really a doctor? I'm not sure he's qualified to be a soft drink.