There was a content delivery issue that has since been resolved on our end. Third party patches were not getting pushed out in January because of this issue. This may be the reason for the reduced number of patches in January.
There was a email distribution list for updates but it has since been removed since Patchlink Desktop is end of life March 31st 2018. This document explains what product is replacing Patchlink Desktop. HEAT PatchLink Desktop Migration to Ivanti Patch for SCCM
I would like to point out however that a notification group probably should not have been discountinued until the product is fully discontinued. We have the upgrade on our radar but have not yet been able to migrate to the new product due to existing projects. Perhaps Ivanti can do better in the future with notifications.
I will pass that message on to the correct person/department. Thanks