Not sure if ironic. 172 is definitely on the low numbers for a country of 350M -- especially with 50 states that could have their own local news non-profits (tv, radios, newspapers, online version of the latter two, etc).
> Outlets must be domestic.
> Outlets must be active, though they do not need to be publishing new content on a regular basis to be included in the study.
> Outlets must be young.
> Outlets must be primarily digital.
> Outlets must produce original reporting.
> Outlets sponsored by an institution must produce journalism that focuses beyond its own walls.
"Young" and "primarily digital" are the biggest restrictions.