When I tried it I went ahead and used my normal lubed patches, and it seemed just like anything else I had used fouling-wise. Probably a sign I should have followed directions. They appear to have changed their recommendations, at least going by what you found on the site.
My hunting pard told me when he first started using the stuff it recommended wetting patches in a mix of Murphy's Oil and water, then allowing them to dry completely. He's in Equador for a couple of months, or I could ask him what the mix was.
In any case, I've shot with him and his patches are as dry as cleaning patches, and he never lubes them. Never seems to build up any fouling either. I pressed him about cleaning, and he said he just pulls and cleans the nipple now and then, and cleans the hammer to get rid of any cap fouling. If he remembers to do it. A couple of times a year or so. He's been using it for quite a few years now.
Hard to argue with what I've seen. He takes good care of his gear, and if it was causing problems I know he would change his sinful ways.
Like lots of other folks here, I'll use whatever is available in order to keep shooting. I've got about 15 pounds of Pyro I picked up from a friend's estate, and until that's gone I'm not likely to buy another jug of Shockey Gold or anything else.
I've got a little bit of the holy black, but use it mostly for testing while saving the bulk of it for my someday flinter. Of necessity I'll be building a smallbore flinter in order to stretch my meager supply of black. Cuzz there aint going to be any more when it's gone.
If anyone smarter than us can figure out how to get the real thing onto our rock sitting out in the Pacific Ocean, I'll be standing in line with about twenty other guys waiting to receive your generous donation. We'll pay shipping on the second load, but you're going to have to make all the arrangements and pay shipping on the first one before I'll accept any criticism from anyone for using subs.