I find it hard to grasp how these kind of services turn a profit (apparently they do because there are so many of them!). The bandwidth and storage costs must be huge and I can't really see the benefit in paying for an account. As far as I understand even paying users have download limits and compared to something like a seedbox your account is only valid for one file hosting service while you have no guarantee that the files you'll want tomorrow might be on a different file hosting provider.