Yesterday (Monday 16th July 2018) VMware announced the End of Availability for vRealize Log Insight for vCenter. This enabled all vCenter Server licensees to enjoy a cool 25 OSI (Operating System Instance) usage. Sadly, the current version of vRealize Log Insight (6.4.x) will be the last version to support vRealize Log Insight for vCenter and, as such, the next release will not accept vCenter Server license keys during activation. End of General Support for vRealize Log Insight for vCenter will run until 23rd August 2019.
Please note, vRealize Log Insight standalone (part of the vRealize and vCloud Suites), Log Insight for NSX, and Log Insight for VMware Cloud Foundation will not be affected.