If anyone is interested in using a source-available license for their own code, the Polyform Project has a set of standardized, source-available licenses. https://polyformproject.org/
PolyForm Shield would probably achieve the same result as the Timescale License. https://polyformproject.org/licenses/shield/1.0.0/
I am using this quite successfully in Micro (https://github.com/micro/micro). Having spoken to one of the authors Heather Meeker, who wrote the majority of the custom licenses, I'm fairly confident it's going to become an industry standard. There is no point wasting time drafting custom licenses. Drop in Polyform Shield to defend against AWS and others in one simple move as you would have used MIT or Apache 2.0 licenses in the past.