Watched a history doc blip and i guess it was the space set and cars that saved the little Lego family business from bankruptcy at one point just when their patent had run out and five other copies on the market.
Oh, and when that weird Star Wars movie came out, all the big companies said "No". Kenner made a deal for 95% royalties.
The Toys That Made Us
https://www.imdb.com/title/tt7053920/