Bezos cares because his businesses have billions of dollars in revenue from the federal government. Trump has already claimed to personally review those contracts and was reported as trying to kill the $10B JEDI contract:

https://www.cnbc.com/amp/2019/10/26/trump-mattis-screw-amazo...

By all accounts, he’s prepared to be more authoritarian and less bound by the law if re-elected and he’s already threatening journalists with rape and talking about yanking broadcast licenses for channels which don’t kowtow to him.