> included multiple test harnesses (!)

ive seen plenty of real code written by real people with multiple test harnesses and multiple mocking libraries.

its still kinda irrelevant to whether the code does anything useful; only a descriptor of the funding model

If I'm reading this correctly ("a single homepage load of http://garryslist.org downloads 6.42 MB across 169 requests"), the test harnesses were being downloaded by end users. They weren't being installed as devDependencies.