Why can I have a port-limited subscription to WorldCat on FirstSearch?
Libraries joining OCLC for the first time must start a new WorldCat subscription at the unlimited access level in order to equitably fund OCLC’s efforts to provide open-Web visibility for libraries. When you subscribe at the unlimited level, your library never runs out of WorldCat searches, and users are never turned away. Current OCLC libraries with an existing port-limited subscription to WorldCat may renew at the same port level, or increase their access to unlimited access or a higher number of ports, to maintain their participation. A library cannot renew at a lower port level and retain visibility of their holdings on open-Web WorldCat.
