I'm sure Zen has lot's on knowledge about why. I also think the competition from Chinese mods has always been an issue. A guy walks into a Vape shop and can buy a 75 watt DNA something for well under a $100 (about a $1/watt). He's not on these forums and doesn't have a clue about Provape quality, or even likely care it's made in the US. He sees a Provari for triple the price (roughly $3/watt) with less watts and whips out his credit card for the DNA. I'm just saying the competition from the Far East had to be rough on Provape. For the same price as a Radius, the same guy could purchase a 200 watt device. And we surely know more watts is better, right?

That said, it's the FDA who truly killed Provape.