It is a bit odd that MS go to the trouble of putting out these updates for legacy OS but don't make them available via automatic updates. Users have to firstly be aware of their existence and then have to actively seek them out and install them. If they had been put out through automatic updates they (MS) would surely get a better take up rate?
EDIT The link in your post is just for the single May patch, My first post gives links to the chunk issued in June, I think I had 9 then.