It’s not a place I’ve ever figured out the characters beyond a single thread when reading about stuff but I find it a valuable resource for many things. Especially extraction like you said, but also they’re very good with hydroponics and automation, and nutrient program building and analysis from base salts. I think one of the site mods is the person behind the fulvic product that I use, Mr. Fulvic, which is sold commercially as AGT-50 by Agtonik, which is his username on there. They’re a company from Kalamazoo Michigan that water extracts an ancient humus deposit they control, the test numbers for their product vs other fulvic supplements are pretty off the charts! That’s where I found out about the stuff and read a lot of reports and tests from commercial growers that convinced me it was the key to growing with organics or salts as a chelator for everyday use, and a steady micronutrient source as well 
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