You know what, you may be on to something there. If you don't have funds in your account it wont log in, it asks to deposit. Even if its just 0.001 or whatever. Then you can browse all you like. If you see something you want then deposit more BTC to the desired amount. If you don't to want to buy then withdraw your BTC again if you need it. But you should always have money in your account to browse. Simple