Modt of the early smurfs were made for campaigns. I think BP, National etc told Peyo what they would like and he then gave the job to Schleich and Eva. They were just manufacturers and after Peyo approved the designs. None of the early designs I think was made as a wish from Schleich to Peyo.
These were designs BP wanted.
Then in 1970/71 Schleich started selling them also, but just the same molds BP wanted. The designs were made for BP. I would guess Schleich started with the emblem in those years.
The 6 first ones were made for Kelloggs, not for Schleich. They just sold them later.
And as you see Normal was not sold, only gold.