Sorry to bump a dead thread but for anyone who comes across this thread: This is a scam.
I had $500 burning a whole in my pocket so I decided to try this out.
I sent BIT (Bitcoin Investment Trust) $500 worth of bitcoins on January 2. I ordered the $500 tier... and then my bitcoins disappeared.
They have a page for contacting them but it just for show. They say you will be able to contact them once you order something but thats not true.
And you're unable to withdraw your bitcoins as ordering something takes the bitcoins out of your wallet.
It is listed on thehidden wiki's scam list: https://thehidden.wiki/dark-web-scam-list/
tl;dr: its a scam