They probably monitored the communities that talk about these services and figured that suspicions were growing. Also if you say that there are more services out there, then it makes people think twice.
Not only prisoners, "slaves" being ruled by those (rich) in power with little ability to have any say. Similarly to how US prisoners are paid slave wages to manufacture american goods.
It may not be the best use case for you. But you can use the Oracle Cloud forever free tier to run a basic Kubernetes setup. If you don't want the limitations on the networking then you can always pay extra for another public IP.