Realistic earnings estimator

@padso
The egress is verry dependent of geo location of you and your clients, aka the ones that have file pieces on your node. Maybe geo location is not the proper term. The link between you and them is PTP, they download directly from your node. If you are the closest, in terms of network pathways, you can win the race and the piece is downloaded from you, instead from others. Your piece has other copies in the network. The ingress works somehow different; your node is chosen to store a piece for the client. The egress instead is a race to upload the piece to client. So you can have the same ingress on nodes from different locations, but when clients download those pieces (egress), nodes are winning races differently.