Example Credit Plan Most users will have the following "credit plan": Action Cost Description Signup 25 Tunnel Request -10 Tunnel Approve -5 10 Can't request a subnet, due to lower bound Week uptime 5 15 Can request a subnet Subnet Request -10 Subnet Approve -4 Configure 1 NS -1 0 Out of credits, save some more in the coming weeks Cost Table The current default cost table is: Action Cost Adding a reverse DNS server debits 1 Approving a subnet request debits 4 Approving a tunnel request debits 5 Deleting a subnet debits 50 Deletion of a tunnel debits 25 Moving a tunnel's endpoint / Change Tunnel Type debits 15 Removing a reverse DNS server debits 1 Requesting a subnet debits 10 Requesting a tunnel debits 10 Static tunnel IPv6 endpoint didn't ping for a day debits 5 Static tunnel IPv6 endpoint didn't ping for a week (autodisable) debits 50 The host pinged yet another week credits 5 The above list shows the default credit costs, each PoP can have their own set of costs. I think it takes about a week of tunnel uptime to get the 5 isk so you can request a subnet.