Then make it an opt-in. Companies should use the more "opt-in" method.
Bundle it under "experimental" or "advanced features" in an easy to use page with a very clear explanation of what each feature does.
Bundle it under "experimental" or "advanced features" in an easy to use page with a very clear explanation of what each feature does.
I think opt-out makes sense though, for users who don't a feature.
Features that will go viral are worth adding for all, features that did not can be kept there.
Twitter very likely did market research on its effectiveness for the target market they were trying to please. Probably that's just not you.