Muoitran on r/blockstack asked the question:
Hi, Just a few newbie questions after I read your white paper: http://www.cs.princeton.edu/~mfreed/docs/blockstack-atc16.pdf 1. Where does the registration fee go? 2. Who pays for the data storage on the cloud? 3. How does the abstraction for names transferring look like in a Bitcoin transaction?
Thanks
The money that users spend to register names is “destroyed” meaning that it is sent to a “black hole” address from which no one can recover the money. In a way this is equivalent to giving the money away to everyone in the ecosystem (because the value of the underlying cryptocurrency goes up if parts of the currency is destroyed).
We’ve debated moving to a model where the payments go to miners instead. See this discussion on Github.
I can answer your question about storage costs separately. Basically, users pay for their own storage by connecting their Dropbox/Gdrive etc.
For an example of name transfer transaction see operations in this block on the Blockstack explorer.