That is the reason BROCA is given freely to SPEAK stakers, just like on HIVE and RCs. If you hold a little SPEAK you can enjoy free uploads. The fee will be small regardless, we are talking cents, something that the user would not feel as a burden. So combine the feel of HIVE with the RCs/BROCA + it being inexpencisve, we belive this should be enough to offer an enjoyable experience. Storage is very cheap, 1$ can get you 1gig stored for 200 years, and storage is only getting cheaper and cheaper every year. With the SIP we could offer a free experience, but we have to stop spam, so you'll need a spam/gass token to protect the network anyway.