Although allowing free access to content allows the non-uploaders to participate and that in itself is reduces the bar for content providers to store their data on SAFE, especially if a PtP model (perhaps with some form of tipping) is in place.
The masses will migrate over to SAFE if the barrier is not there to hinder their use of SAFE. As SAFE becomes more used then more will create an account and participate further allowing a tipping model to further the income of the content artists. Putting hurdles in the way does not promote an access for everyone model.
Even having to create an account is a big hurdle that most will not jump. Look at forums, they have most of their visitors come from people who are not registered. They view the info and never return. If those forums made people register before viewing then most ignore it, the people just googled something and want the info, they will go elsewhere.
Your model not only requires casual surfers to create an account (and most simply will not), but also to obtain SAFEcoin and spend it. But they likely will install a free addon&client, just like they install a PDF reader. Then when they see SAFE as useful for storing their personal info they might take the effort to create an account. But that comes long after SAFE network is being used more widespread.