Presumably, as the good in question becomes scarcer, its value will increase to the point where it makes sense to sell it, or use alternative solutions.
When IPv6 is fully implemented, an IPv4 /8 will be essentially worthless. Reasonable people can disagree as to when that day will come, but it will come. It's probably not that far off.
Why not sell it or suballocate it while you can still get money for it?
Apple has ~$150b in cash reserves. Selling a /8 would amount to nothing on their balance sheets, whereas owning a /8 can have invaluable uses.