Is this really the case the IP blocks can be sold onwards?
I always thought that IP address allocations were assigned by IANA (through the local regional registries like ARIN and RIPE), and as such were not any property of the assignee to be sold. If an address range was not needed anymore and the assignee surrendered control of them, they would return to the free IP address pool at the regional registry.
You can now perform a "specified transfer" to another entity, and if some money flows in the reverse direction, ARIN says they don't care. There's even "Craigslist for IP addresses": https://www.arin.net/resources/request/stls.html
I always thought that IP address allocations were assigned by IANA (through the local regional registries like ARIN and RIPE), and as such were not any property of the assignee to be sold. If an address range was not needed anymore and the assignee surrendered control of them, they would return to the free IP address pool at the regional registry.