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Sure, you could write an app that does A/B testing, but the whole idea is that people will use Sandstorm to run _personal_ servers/apps. And A/B testing your own reaction to an app doesn't make much sense.

Runtime permissions of these apps will be easy to control, so the Sandstorm platform will prevent apps from phoning home without your permission.

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Again thanks! But using Facebook was still a poorly chosen example of what their apps won't do, since they aren't aiming for hosting large customer facing apps like a social network. Perhaps that is what contributed to my confusion in the first place. Now I have a better understanding of what it's for.

Ah, but you could write an A/B testing page and then share it easily with your friends - part of the value proposition is 1) hosting your personal apps and 2) fine-grained sharing of it with others. So it wouldn't be a huge sampling, just your friends.

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