Are you going to add this disclaimer to everything you do now, or is the idea to just take the name over with your capital? It's their name that they've established by being a prolific, well-respected developer; it was also the only search result for it before you appeared, because it's a unique name without an another established meaning. There's no explanation for why you'd choose it outside of not doing due dilligence or just lack of morals.
That's ridiculous. A new platform for journalism can't share a name with a popular Node developer? Even actual trademarks only apply across a category of similar products.
I thought I recognized that name and then I remembered....there’s a developer[0] who has written many packages on npm[1] with the same name: substack
I’ll have to check this out just because of the name :)
[0]: https://github.com/substack
[1]: https://www.npmjs.com/~substack