All trade skills are plat sinks ... but that didn't stop me from "wasting" my plat at level 20 for blacksmithing, on live 2+ decades ago
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I'm not convinced that the wiki should be about gatekeeping playstyles. If someone wants a more frugal path to improving poison making, and the wiki can provide that (while also providing the efficient path), that seems more appropriate to me.
After all, you don't see (for instance) some mob page telling people not to waste their time farming that mob, because it isn't plat efficient ... right?