I have come to the conclusion, through just basic process of elimination, paying attention and anecdotes, that there are likely more than one kind of AEFW that people deal with... so nothing scientific at all. I am sure that most know the disdain that I have for UWC and their lies, but purge was able to kill an easy-to-kill variety whereas it would not kill others, like the one that Dr. Kate Rawlinson studied. I was able to help a local rid a tank of AEFW (the kinds the Dr. Rawlinson studied) with 6 months of flatworm stop dosing every day and many other have had this work too - this tank is still flatworm free. I have had dozen of PMs with questions and thanks from people who had their tanks eradicated too. However, some have not with the same protocol and they are good, reliable hobbyists who were patient and trustworthy with their doses - I suppose that something like an interaction with another additive could be to blame, so who knows. I have tried to not pay attention to the ones who cannot read and expected the treatment to work with a few doses or in a few weeks. Again, this is only mostly based off of anecdotes.
Is it possible that LC could kill some variety of worms? Sure. Will it work on all? I doubt it. It might work on the delta variant of AEFW, but not the omicron?
As for snake oil, what product comes in a bottle that anybody needs for their tanks? Anybody? Bueller? Salt, some sort of carbonate and calcium (I guess that these could come in bottles) and maybe some iron? One persons snake oil is another persons sworn-by remedy... neither is probably true.
I have seen high doses of LC kill fish for really good hobbyists. It seems fine at lower concentrations, so if you are not going to use a sock, then keep the addition low and slow.
From all that I have seen and heard, the hobby stuff and the pool stuff is the same, but at lower/different concentrations. Do the math to dilute and you can use either. It appears similar to GFO where it is only really made in a few places and it is all probably from the same source.