However a token for a service like a domain name does make more sense.
Why? If I want to pay by FIAT or BTC I could simply do this.
If I want to pay by NAT, I have to install another NAT-Wallet, have to make Backups of it, store the passphrase, have to convert BTC into NAT and afterwards I can pay.
This is to much effort if you just buy one domain every two years. Of course, if you buy domains every day it would be better.