|That is good reading material however could it also have a new meaning today?|
Here is a device description copied:
"The Wireless ISP (WISP) mode is a combination of the Bridge and Gateway modes, in which the router still relies on the main gateway to provide access to the internet, but it retains use of the built-in firewall and DHCP services. This is ideal for when you want to limit or control access to the LAN or internet for an individual subset of users."
...where its description implies that it is a one time fee when purchasing the device as it is the device that provides a certain configuration that is needed by the buyer.
In my case however I need it to prevent unauthorized access to my personal computers when using the public/shared network that has its settings set at default which apparently are not very good settings if they allow users to hack into each others personal space.