Cryptyk isn't a cloud service provider; it's a security service.

Consider that while you opt out of Steam's cloud storage, the system itself runs on it. In fact, its throughput relay utilizes it too. While you can opt out of some vectors that require cloud service, you cannot opt out of all of them. In many cases, the platform itself relies on the cloud service.

Shunning convenience isn't a good thing or we'd still be on horse buggies. The goal is to adopt the convenience in a secure manner. So, any service that secures the cloud is taking the right step forward.