Used session when they first started (they were based in Australia). They also created the Loki network. But, sadly, they have gone full shitcoinery and moved from PoW shitcoin to Ethereum token, and rugged all of their node operators. Their excuse for why they required ~$15,000 cost to start a node was “Sybil resistance”, but that just kept average people out and nation states with endless resources could easily create nodes to monitor.