The issue here was Cat 1 ops over people, to which 250g is very much relevant.
§ 107.110 Category 1 operations.
To conduct Category 1 operations—
(a) A remote pilot in command must use a small unmanned aircraft that—
(1) Weighs 0.55 pounds or...
Came here to say this. An interesting thing, and not something that I really care about in terms of regulation-scolding, but it doesn't even seem like review sites (dronedj, cnet, pcmag, etc...) could review it and remain compliant with FAA...