[acomjean]

>The same argument would imply that you shouldn't do computing on VPSes or similar services that other people own.

I don't think he saying that exactly. I think is more of a consider who has the control of the data .

For example. I worked for a company that monitored power use circuit but circuit. The data was uploaded to our servers and processed by our software. All very convenient. You could download some of the raw data, but generally small chunks. (minute by minute, day by day). You stopped paying and you lost functionality.

This is a similar problem with user generated fitness data. Some "Services" don't make it easy to take your data with you.

VPSs you generally have more control, and can just dump your data and move to another provider.