Yea same, then I realized they're not free either :(
The differences aren't too bad, I diffed [1] the USPS Puerto Rico sample with Census ZTCA 2026 [2]. I think I'll just stick Census, simpler model too for data analysis too, if I assume boundaries never change. :) Interestingly, I also learned ZIP Code™ is also trademarked.
[1] https://geojson.tools/?url=https%3A%2F%2Fgist.githubusercont...
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