Wow, this article is scientifically weak.

Alcohol poisoning refers to an overdose of ethanol but these people are dying from methanol poisoning.

Methanol is not added because it is cheaper. Rather you can extremely cheaply produce ethanol synthetically via a process that also produces smaller, varying amounts of methanol. You can’t taste the difference between a drink that will kill you and one that won’t because it is still mainly ethanol. Legal ethanol is made by fermentation followed by distillation. People keep making and selling the illegal stuff because mostly it doesn’t kill people. Except when it does.