This is just a scam, right? They are reselling Microsoft's patches, and just assuming that MS is going to 0-day patch win10 to all customers even if they haven't paid for the extended support.
Even when support officially ends, enterprise edition allows companies to purchase a yearly subscription to continue support for several years with each year getting more expensive then the last. Also the LTSB edition continues support until 2029. It could be possible they have a way to use these patches through this?