Who is buying these things at 800 dollars? At that rate why not go with a 1080 Ti? The Vegas are only amazing at Cryptonight from what I can tell. Almost a cryptonight ASIC as a mining card...
Why wouldn't they? A modified vega gets double what a 1080ti can net you in returns. Even if it's cryptonight/ethereum only there are these things called Exchanges where you can then convert to your coin of choice. Not sure if you've heard of them before.
Not anymore my friend. A 1080Ti, albeit overpriced, will now net you more per day than a Vega. If the Vega was priced at MSRP then there would be no contest. But at $800+, there are better choices out there.