Why no monthly fee?

"Simple and Affordable".   We really want to make Firewalla affordable.  

What we want to do is not charge families any monthly fee's, and in the future, we want to create features for pro or small businesses that may carry a fee.  These newer features (we don't have any yet) will be more useful to power users and consume much more resources than a simple family network. 

Are there any paid features today?

No, there is none.  We will be working on them once we make 'family' users happy with our current feature set.

What are some features that may be for a fee?

It will be resource consumption based.  For example, we keep 24 hours detail history of access for all devices, and some users may want to have more or achieve that access history.   Archiving will cost us for storage, hence a fee. This feature will have no use for families, but, important to businesses.