Got an e-mail from NGC touting their version of Vault Box called "Rip a pack". I guess you choose a tier ($159, $500, etc) and pay for it, then rip open a virtual pack to discover the coin therein. Kind of strange, but at least they post the percentage odds of getting a premium coin. Must be a lot of gamblers out there amongst us collectors.
I have not done eBay live for a long time, but I was bored and browsed them for a few minutes. I was surprised by how many live streams are doing the pack thing, too. I did the Vault box once and will not do it again. Too expensive and not worth me trying to play around with. My budget is limited and I don't like paying high for cheap mystery prizes.