Hi :)
Let me know if you have any additional questions.
Sorry about missing that part. The node does do some minor calculations but it's nothing like PoW/mining that people usually think of when they think of cryptocurrency. It's doesn't use lots of electricity like CryptoCurrencies that use PoW.
The response from the other guy addresses your other concerns.
I understand that it's annoying how the barrier that resists sybil attacks also is a barrier for idealists like yourself. How if you still want to help without spending money I recommend that you use Lokinet, and Session https://getsession.org/ as it will increase the anonymity set for everyone using these services.
From 24bitFLAC (apparently a Loki team member):
"No, Session doesn't have perfect forward secrecy. PFS adds enormous complexity but is only relevant in an extremely narrow set of circumstances given the rest of Session's design. We further explained our decision not to use PFS here."
So, yeah, no PFS.
Thanks for the update /u/keejef!
The jami developers are building a P2P app based on git:
https://jami.net/swarm-introducing-a-new-generation-of-group-conversations/
Perhaps Session and Jami developers could work together to build a common spec, so the two networks could interoperate?