OIN was set up to avoid things like the SCO suite in the future. It was created by Redhat, Novell, … . The current rate of adoption is 150 licensees per quarter.
OIN protects, but also enables and influences government.
OIN makes an explicit expression of the idea of cooperation: there is a “system” zone of cooperation and non-agression, and a “Market” zone with competition. It’s a cultural norm rather than just a license.
When joining OIN, core Linux patents should be transferred to OIN but other patents are cross-licensed. In addition it makes defensive publications against future patents.
The only companies that have rejected the OIN commitments are companies that want to reserve the right to sui whin the Linux core OS.