Just how loyal must you be to deserve Dropbox's latest slathering of free storage? Well, that's not exactly clear, but some early subscribers to the 25GB Pro option have been receiving emails congratulating them on having "a ton of cred" and telling them they'll "no longer receive a bill" for the rest of time -- unless of course they choose to upgrade to one of the doubled-up plans announced yesterday. Generous? Sure, but then again it wasn't exactly fair that folks were paying for 25GB when some non-premium members were swanning around with upwards of 50GB simply for buying a nice phone or uploading a few photos. So, consider it justice.