We've needed a crowd-sourced human testing platform for software products for some time.

It would need granularity: as a developer I should be able to purchase N minutes of time from N people, potentially in such and such a demographic.

It would need an API: I should be able to build human testing into my deployment infrastructure.

It would need accountability: at minimum I want webcam footage of the tester using my product.

There are complications, but I see no reason why almost all of these couldn't be overcome by sufficiently smart automation.

Someone go build this!