To be clear, NordVPN’s VPN service will remain paid. There is also no limited free version, as other providers offer as an entry point.
However, NordVPN provides the Meshnet function for free. The provider describes Meshnet as a decentralized VPN that can be set up and used via the NordVPN programs and apps.
With paid VPN, instead of connecting to a server managed and configured by NordVPN, you make encrypted connections to devices owned by yourself or friends who also use Meshnet. You’re practically building your own VPN.
Meshnet started a few months ago as an add-on feature of NordVPN, and now the feature is being made available for free. So you don’t need a NordVPN subscription to use Meshnet.