I'm not fundamentally opposed to any deviation in licensing. But I am much less inclined to use software if the license hasn't been reviewed/endorsed/used by others widely.
Also, I'm curious if you considered just addressing the license to anyone excluding $COMPANY_YOU_ARE_WORRIED_ABOUT. Not sure what the implications of that would be, but it would be interesting. Realistically, a startup has to prove itself in a relatively short period of time, and in that short period of time there are generally very few competitors (typically zero or one) that threaten your business model itself. If you have 10 competitors that actually threaten your business model, your business has already proven itself ;-)
At that point we did engage with multiple folks in different organizations, but realized that we had a business to build and didn't have the bandwidth for all the politicking usually required to establish a standard.
However, if someone wants to propose a standard around the principles of the Timescale License, then I would completely support that discussion.
Also, so that we are 100% clear: most of our code base remains licensed under Apache 2. The main thing that this post is trying to convey is that multi-node will be free under the Timescale License.