Thanks for the link...don't understand #6:

"Because NEO holders will force transaction costs to be kept at zero, there is no economic incentive to becomes a consensus node. Thus, the only incentive to become a consensus node is to uphold the honesty of the network. This is a separation of concerns unique to NEO."

If consensus nodes have no incentives then why they should become one? also how many NEO do you need to be eligible as consensus note?