Since
1. you can use the service without any non-free software installed on your
computer
2. it's not SaaSS
3. the conversations are obviously end-to-end encrypted
the license of the software running on their servers is a minor concern.
It would be nice if they released the code, but it's not a necessity.
If it really works the way they promise, then we might have an easy-to-use
skype alternative which gives the users freedom and respects their privacy.
Maybe someday tor-browser might include the addon - how awesome would that
be!
I sure will give it a try.
