Most people seem to be suggesting a pricing model based on the number of chat sessions. Something interesting that I noticed is that users will often start a se

Most people seem to be suggesting a pricing model based on the number of chat sessions. Something interesting that I noticed is that users will often start a session but no one else will join. The ratio of joins to session starts is around 1 to 6. That makes me wonder if I should charge per session started or per session joined. Something interesting to notes is that the actual video chatting incurs no cost to me because it's all peer to peer. So the only real work happening on the server is passing along chat session ids to the clients. The one problem I have with charging per session (and most services that charge based on usage for something they don't really control) is that the client might not have any sense of what their usage is like until they get a bill.