Because they're a real estate company, disguised as a fast food chain. Ford on the other hand isn't an internet company, but their IPv4 range represent and actual value on their balance sheets.

Realistically, Ford may also have use their IP range in a kinda of haphazardly way, simply because they never had a shortage or had to deal with multiple public range. So cleaning up their network, to be able to free any number of IPs would be a lot of work, at a high cost, with no real benefit for the company. Sure they could sell the surplus IPs, but they aren't that strapped for cash.

Wrong answer.