[IvyMike]

Here's a NYT article on the origins of Purple Air.

https://www.nytimes.com/2018/11/30/style/air-quality-polluti...

I have a Purple Air sensor; I view the money I spent on it as helping to sponsor a "citizen science" project. Could the nature of the project change in the future, to where I feel like I was taken advantage of? Sure, I guess. But I'm ok taking that risk.

[supernova87a]

I see. Ok, well at least it's not some tech app service trying to charge on the front end and make money off the back too.