That's also FUD, two ways.
First, what the Timescale License prevents is somebody offering our Community Edition as a standalone "TimescaleDB-as-a-Service", a la AWS bundling it as part of RDS, or Microsoft as part of Azure Postgres. There is a clean technical test for "DDL access to the database" by users in the license. It's not tricky. You can absolutely develop/sell/distribute/provide analytics, monitoring, or data analysis products on top of TimescaleDB Community Edition. Many companies do.
As to "hopelessly-entangled source", if you know what a directory is, you can tell the difference. There's a "/tsl" subdirectory with Timescale Licensed code. Everything else is Apache2. You can compile pure Apache-2 versions with a single compile flag, and we distribute Apache2 binaries. In fact, the Postgres community itself distributes Apache-2 binaries, and Microsoft, Digital Ocean, Rackspace, and other clouds make the Apache2 version available as part of the managed database offerings.