Please read the announcement if you're interested to know why there was a need to turn to an open-core model.

Also, you're correct, that open-source project still works for the majority. Not for everyone as YouTube is testing geo-fenced patches. Soon, that version will stop working.

You're free to modify the source to make it work but no further updates will be pushed.

The upcoming 2.0 after listening to the customers will be an opt-in model (not a paywall).