Earlier quoted context omitted.
It may be available to be licensed for use in the private sector, but it is hardly a "public service." Without exaggeration, I think it would be closer to the truth to call it a "public menace".
"public service" was a bit of a misnomer. The article states: "Amazon is providing police departments in Orlando, Fla., and Washington County, Ore., with powerful facial recognition technology." Rekognition is SaaS (software as a service). Anyone can pay for running Rekoginition on their data sets (within Amazon ToS). Rekognition was not created directly for the police departments in FL or OR.
And that's whats happening to with a lot of surveillance technology, see Palantir, they are being packaged and aggressively marketed to schools, law enforcement and government.
Taken together these companies are selling and enabling a surveillance dystopia for no bigger reason than personal gain and the people responsible should be called out.