Hi TheBobkin
In my case VCSA has internet connection and can reach all the mentioned URLs and I've also added the metadataurl parameter to the health check config file.
But I have a copy from the release catalog file from 2 months ago and it's exactly the same as of today:
And if you check the arrival and processed date in the release catalog json file from above URL, you will see it's from 12/11/2018.