If he wanted to promote the race he could show up to be an honorary commissioner and help start the race, pose for photographs, sign autographs, and give interviews to the local paper and news - then have his picture taken with the race winner and say good things about him. He doesn't need to fly out there in his private jet, then go stomp all over Cat 1's and pro's making $15k a year, some of whom probably slept the previous night in a van.
Greg Lemond won the race at 18, before he even headed to Europe. There were a few races Greg did have a go at in the US during his peak racing years. The Coors' Classic, Tour du Pont (both akin to ToC of today), and a few others where he mostly rode in support of other riders, the ABC Classic comes to mind, on the Coors' Light team in the mid-80's. Not quite the same.
Greg Lemond won the race at 18, before he even headed to Europe. There were a few races Greg did have a go at in the US during his peak racing years. The Coors' Classic, Tour du Pont (both akin to ToC of today), and a few others where he mostly rode in support of other riders, the ABC Classic comes to mind, on the Coors' Light team in the mid-80's. Not quite the same.