First of all, I'd like to know: how are the fees on Lightning when you have to route through the network? Do you often find it expensive to pay someone several edges away on the graph?
Secondly, is the network segmented? Is the network likely all connected, or is it possible that there are hundreds disconnected swaths? I'd assume that if there were only a few disconnected networks, someone would take the initiative and link them together to make an absolute fortune routing payments.
Thirdly, how to use lntip?