Comment by gbro3n

The licence method we went with for AS Notes (https://www.asnotes.io - a wikilinks and markdown based notes / docs / blog extension for VS code) was to make the client (extension) fully opensource with a public / private cryptographic licence key model, with a couple of pro gated features. I think an opensource product is very important for a notes product, where the implications of loosing access to a tool are huge for users that invest a lot of time in a knowledge base.