Is it impossibly surprising that someone might only bother to use the normal app for the purpose of signing up for the service so they can use another app they

Is it impossibly surprising that someone might only bother to use the normal app for the purpose of signing up for the service so they can use another app they heard of? Think of recent versions of Internet Explorer: "what is my purpose?" "you install Chrome." (But, yeah: I'd say that it isn't even quite about maintaining the user but the extent to which they continue to engage; like, the user might still be a user, but are they someone who spends the entire day using the app? A number of these alternative clients were what were being used by teams of people to be able to manage the really complex/important accounts.)