Same reason Chrysler wouldn't let us use the Pentastar when we founded The Middle Georgis Mopar Club about 30 years ago. We sent a letter to their legal department asking permission just to cover our butts. They said no. We did it anyway. lol
The club I help start in 87' had the same issue with Mother Mopar. We finally did get permission to use the Pentastar in our club Logo. We also new some big shots then. Times sure have changed.