Same as most gas station boner pills. It's cheaper and easier to just compound the real stuff than it is to come up with something else. When they get caught they "change the formula" and put it right back on the market.
Trump said it himself the other day. I'm paraphrasing a little bit because I don't feel like finding the exact quote, but when talking about Republicans that don't support this war against Iran he said something like "They're not maga, I am."
Historically speaking the cult of personality disappears once the leader dies. Nobody likes Vance and nobody is afraid of him. Yes, he's going to be bad, but not nearly as bad as what we have.
I wouldn't be surprised if he's one of those "wiping or washing your butthole is gay" morons.