Here are the docs:
   [1]http://www.scribd.com/doc/202555785/United-States-vs-Charles-Shrem-a
   nd-Robert-M-Faiella
   Page 11: safe-mail, not so safe!
   On Mon, Jan 27, 2014 at 10:16 AM, Rich Jones <[2]rich@openwatch.net>
   wrote:

   Does anybody have any more information about what constitutes
   "operating an unlicensed money transmitting business"? Would my
   cloud-mining operation count? Relevant:
   [3]http://www.law.cornell.edu/uscode/text/18/1960
   [4]http://www.law.cornell.edu/uscode/text/31/5330
   Oh, just in case anybody was wondering why Coinbase hasn't been
   touched.. they're snitches. FOIA pending:
   [5]https://www.muckrock.com/foi/united-states-of-america-10/coinbase-fb
   i-9727/

References

   1. http://www.scribd.com/doc/202555785/United-States-vs-Charles-Shrem-and-Robert-M-Faiella
   2. mailto:rich@openwatch.net
   3. http://www.law.cornell.edu/uscode/text/18/1960
   4. http://www.law.cornell.edu/uscode/text/31/5330
   5. https://www.muckrock.com/foi/united-states-of-america-10/coinbase-fbi-9727/