Well one of my color targets arrived but I haven't been able to make a profile from the scan, which I guess is no surprise because it was printed on cardboard instead of paper and I can't even get it to go through my scanner properly. Looks like it was made for flatbeds and cameras, not ADFs.
That guy I talked to says he's never even heard of magazine paper color targets because magazine printing is so inconsistent to begin with. Two copies of the same issue of the same magazine will have greater differences than two photo prints. So, if you try to print color targets the same way, you won't get consistent color targets, or at least not consistent enough to be useful.
Getting multiple scans of the same magazine is more useful than people think.
My other target will arrive next week, but after eyeballing the target I have, I already have a pretty good idea of my scanner's faults. It doesn't get the very darkest of colors or the darkest grays, registering them as black. Technically this is referred to has having a limited "Dmax" or a limited dynamic range and is very typical for ADFs from what I hear, probably because you need to have a lot of exposure to get dark colors and the speed of the paper going past the scanner doesn't allow much time for those colors to be exposed. And although flatbeds are a little better in this area, it's still where most of their color faults are too. Apparently the most advanced scanner target is made by HutchColor and it's precisely because it has many different kinds of dark grays and dark colors. That's where scanners need correcting.
I was able to buy a used HutchColor off eBay. We'll see how it works next week, if at all. I'll have some other projects to report on. I bought a long reach stapler so I can put magazines like those rare Game Player's PC magazines back together after I scan them, and I my book press and gluing materials arrived so I can try to put glued magazines back together. Seriously! But I really should get back to scanning.