...

d) globally unique addresses for each participant using RIRs

d) is basically having the Internet community pay - both in real money for staffing at RIRs and in scarce IP address space - for no benefit in return at all for a function that those N companies should have an institution perform for them via c).

My company uses d) and we pay full ARIN fees at the highest level since our ARIN allocations falls into the largest fee slot. So your comment is simply not true in this case. --Michael Dillon