Yes, TimescaleDB "core" - still Apache 2.0
TimescaleDB multi-node - was never before released, is now released for free under the Timescale License, a source-available license
There are other capabilities (e.g., gap-filling) that are also under the Timescale License, in addition to multi-node.
The Timescale License prevents "TimescaleDB-as-a-service" usage.
You can still run software / services on top of Timescale Licensed software, as long as you are not offering "TimescaleDB-as-a-service".
The Timescale License currently prevents running any modifications in production, but we are actively debating removing that restriction (as I mention elsewhere).
Hope this helps.