We needed more IP addresses to monitor key points on our TWR (The Wired Road) network. To get them we had to release the old block and get a new larger one. That required changing hundreds of references which caused considerable discomfort as we waited for the new addresses to propagate through the Internet Domain System. You can "resolve" domain names to IP addresses with "nslookup", "dig" on Mac OS and Linux. "dig" can be download as part of BIND from http://www.isc.org/downloads/.
We now have a few spare which can be routed to nodes on out TWR network. That requires changes to the firewall at the POP (somewhat traumatic). There are many reasons one might choose to get an Internet facing IP address and many reasons not to. One good reason is security cameras accessible from remote locations. CAUTION, if you can reach your LSNet connected device on the Internet, so can everybody else. Some devices have the software capacity to "tunnel" to a "reflector" which may be less expensive.
There are fees involved. The firewall work starts at $30 (non-recurring). The "lease" fee is $15/month. The work on your end, if required, is on the meter at $60 per hour.