Notice this at the bottom of that site:
"Cadillac, the Wreath and Crest Emblem, related Emblems and the vehicle
body designs are General Motors Trademarks used under license to Kent."
The $60 bicycle I used to build my "Snake Farm" bicycle is a Kent bicycle from Walmart.
I doubt GM hires somebody to build bicycles. More like some Chinese bicycle company comes to GM and offers to pay them X dollars to use their logo.
__________________
"be careful this rando stuff is addictive and dan's the 'pusher'."