Dalton Caldwell, on the ADN blog:
"Since there are numerous examples of freemium business models which didn’t succeed, we wanted to be very careful in our approach to pricing. We have been spending the past few months learning and analyzing data in order to come up with a plan for a sustainable and beneficial free tier."
The free tier, although limited, is actually quite fair:
- Follow a maximum of 40 users
- 500 MB of file storage
- Upload a file with a maximum size of 10 MB
In addition, paid users can invite friends to join ADN for a chance at increased storage space for both the inviter and invitee. Read the full post for more details.