If you look at their non-USA Leofoto page you'll find it's still marketed there. Again my guess would be since it sure looks like a copy of the Anvil they don't want the liability of marketing it on their USA page or selling it directly in the states. That said I have seen some other shops market these in the states outside Ebay.
Leofoto was founded at the beginning of 2014. It is located in Zhongshan, beautiful Pearl River Delta area in China. Leofoto team has been designing and manufacturing series of camera support systems by comparing and studying the high-end photographic accessories made in China and abroad and...
www.leofoto.com
The problem I have with Leofoto.......aside what appears questionable IP ethics (and it's not just the Anvil 30 they appear to have copies of other RRS products you won't find on their USA website such as the MBC-20 being what sure looks like a copy of the RRS BPC-16 and it's not just RRS, their MH series heads are pretty clearly "inspired" by the Novoflex Magic Ball heads)......is that they make like 7 different heads marketed under their shooting products, but give absolutely no information on how they compare or the features that differ between them on their website. In some cases it's obvious, lever vs a friction knob etc. but in others it's pretty hard to identify which is the better selection for your use. It's almost like they are trying to just put out as many designs of the same general item and hoping that some of them work well. I've thought some of their designs are interesting like the MH and STB heads, but there's almost no info out there on their pros/cons.
I seriously doubt they compare with RRS for half the $ I've compared some of their other products and while I would not say they are junk they were not equivalent with RRS. That said, not everyone is going to drop $2000 on a tripod/head setup, so there's a market for mid cost items that perform well but not as well as the best most expensive options too. However, at the end of the day if you're going down the competition road, we're all going to spend way more $ on ammo, travel, fees, etc. over the years than any of our equipment, rifle, optics etc. Plus as you said, at say $200 or less vs $500 for the anvil, even if it performed 90% as well at half the cost that's hard to argue with. I will say we've seen plenty of review type posts saying that while the Leofoto stuff is good, it's not on par with RRS, and a lot of posts where guys started with Leofoto and later got the RRS anyway. I don't remember seeing many.....if any posts reviewing leofoto heads saying that they were absolutely every bit as good as RRS and folks stating they saw no advantage to RRS. You can easily see the appeal though, with the hide discount you can basically get a head and 36-40mm carbon tripod for the price of an Anvil 30 alone. Even if it's only 80% of the performance of a $2000 RRS setup, that's going to appeal to a lot of shooters that are not hardcore competitors.
Comparing the two, the real advantages of the Anvil were supposed to be it's super low height, inverting the ball (these two allowed the rifle attachment to be much closer to the rotation point, and the lever friction. Really the only obvious place the MA-40 appears to be lacking in those is it's stack height looks quite a bit taller putting the attachment point farther away from the rotation point. That said if you really want super solid, a lot of comparison posts on here have stated that a leveling plate with a large bowl attachment while not being as flexible as a more traditional tripod head is more solid, even compared to the Anvil 30. There's a video comparing the two, it's not great in that it's also comparing the tripods for each brand, so it's not really just comparing the heads, but it does talk about some of the differences using the two heads and some of the construction differences.