[dominotw]

But the domains can be divided into general classes of users. If jawbone can recruit me for it UP band then withings can also recruit me for its body analyzer. Not all startups in health segment have do its own health conscious user recruiting. There is a lot of overlap between products and I am sure there is some market for a generic user recruitment.

[1337biz]

My suspicion is that you don't want generic users. You want users who are going to stick with your product for a while and not jump from one train to another. Without them thinking that your product stands out changes are pretty low that they are going to talk with somebody else about it.