Currently, most computers in AIXP that has been given away to random people are very likely not used for anything productive.
People that needs computers for providing VPN solutions to random people, wish to give away shell accounts to random/unknown users for free or wish to route some sort of network traffic through AIXP can be given computers for doing this. Generally, as long as you provide a service to some sort of darknet, you can have a free computer (or virtual machine).
However, a computer that is only used to give one guy a shell account for IRC or whatever will be removed from the network. This will happen one week from now. Copy your files and wipe your hard drives.