If consumers face substantial barriers in switching to a rival then there might be an antitrust case. From the point of view of competition policy, the idea of "market for this" vs. "market for that" can be misleading
What barriers are they facing? As an owner of an Apple device, can they not sign up for Dropbox at all? Not being able to signup for a competing service that can involve a financial transaction is not anticompetitive if the consumer has other means, whit they do. Indeed if the consumer goes to the Dropbox website using Safari browser of their own volition, the can sign up immediately.
The issue here is one of sensationalism. As a community, we a far too quick to jump to the "$corp is evil!" conclusion without looking for a reason, however ridiculous it may seem. We, as a community, are too cynical for own good.
The issue here is one of sensationalism. As a community, we a far too quick to jump to the "$corp is evil!" conclusion without looking for a reason, however ridiculous it may seem. We, as a community, are too cynical for own good.