There might be a bit of history involved. I'm GenX - very early GenX, at that. I discovered Monster in 2002 IIRC, back when energy drinks really started to take off. (Red Bull is the only one I remember seeing much before that, unless you also count Jolt, and even then it was nowhere near the pervasive thing it has become today.) I tried everything I could find, and Monster was the only one that didn't taste like absolute crap. I think the siberian ginseng is the key BTW, to complement caffeine's characteristic flavor.

So, back then, most consumers would have been GenX. Millennials would have been between 6yo and 21yo with only the very oldest likely to be buying such things. GenZ wasn't part of any market segment, and Alpha didn't even exist yet. Some of us GenXers stuck with it; at 60yo I still drink a can instead of coffee every day and none of my labs show any ill effects. Maybe we're not the primary demographic any more, but we're certainly still in there.

So ... which of us speaks for all GenX males in the world? ;)