Do you mean it would get expensive to run multiple applications that listen on a single TCP port?
It _might_, if you need a bunch of ipv4 addresses it'll add up fast. But you could always put your own router app in place to accept that port on one IP, find the right ipv6, and forward connections along.
It _might_, if you need a bunch of ipv4 addresses it'll add up fast. But you could always put your own router app in place to accept that port on one IP, find the right ipv6, and forward connections along.