pivot_root , 4 hours ago

You shall not use or attempt to use a device or software (such as NAT, Address Masquerading, Proxying, or the connection of an additional wireless router) that would allow you to connect more than the number of devices set out in the Service Information to the Network.

One of the ways they detect this is by checking the TTL of the packets coming from the “one” device is less than expected. If your router is using OpenWrt, you can configure an iptables rule to reset the TTL of outgoing packets to the default.