I am the DevRel of IPinfo. We launched an open access (CC BY-SA 4.0) full accuracy database for country and ASN information, that has daily updates.
I talked a bit with PFblockerNG's core developer. The issue is that even though the database is free and provides daily updates, they are not a drop-in replacement. If anyone wants to crack at integrating our databases in pfB, let me know. We provide the database in an MMDB format, however the data schema is different.
Docs: https://ipinfo.io/developers/ip-to-country-asn-database