What's the benefit over throwing it at a cloud provider?

There's an active downside of random people being able to see your data, not to mention randomly sized boxes and shoddy network connections (which is a big deal for the microservices which they are touting as a use case, and also for big data. Data transfer is one of the slowest bits of data science). Running a web service on random devices where keys, sessions, whatever end up in memory on some box would be a security nightmare. The government doesn't need a back door if all they need to do is host some compute nodes.

Is it just that for some tasks that are very parallel and not sensitive it might end up cheaper?