Tootfinder

Does anyone actually use OpenNIC?
I selfhost my DNS with unbound, apparently it's simple to use OpenNIC's root server hints but then you remove ICANN ones.
I know OpenNIC's root servers also respond for ICANN domains, but what I was wondering is: can I use ICANN ones for ICANN domains and only use OpenNIC ones when ICANN root servers don't know about a TLD?
#OpenNIC