I believe now they are offering them (
Force.com App subscription, and
Company Community User) in the same bucket under
App Cloud flavor (and also as
Employee Communtiy) and it's called
Employee Apps and Community $25/mo and it provides Read/Write access to
Contacts, but none other CRM standard objects, and also up to 10
Custom Objects. There is also more expensive
Apps Plus license $75/mo that allows to use 100
Custom Objects with each user license. More details can be found here - App Cloud Pricing. There is a link to the pdf file at the bottom where you can see the App licenses comparison in more details.
In regard of
Customer Community - it can't be used by internal employees as we were told by our account representative when we are doing the research, and migrated to Force.com (aka App Cloud) platform.