No. It isn't the inmates who are using Facebook, it's their family members. There could be a whole demographic category of "people with family in prison" which

No. It isn't the inmates who are using Facebook, it's their family members. There could be a whole demographic category of "people with family in prison" which could be quite valuable to the (numerous) services around that market. Private companies manage commissaries, telephony, etc. and charge orders of magnitude above market rate. There's a lot of money in those services.