I understand more or less what proof of importance is. It takes into accounts the number of coins (similar to proof of stake) but the importance part is unclear to me, how as a XEM holder would get importance to the network if I'm not sending XEM out to others, I mean I'm only buying XEM to my desktop wallet hehe. I have a brother, does that mean that if i send xem to him and he send xem back to me we would get more importance to the network? doesn't make sense.
I would say, it's like using a credit card where you earn points, the more you use it, the more points you get (increase proof of importance)....something like that...I know someone tried to game it and got banned by the nodes I believe...
Let's wait for some expert on the topic to explain it more...