How can you be trusted by that number of users if you can't even have that SEO and be the first to show in the results of Google with exact keyword and name of your exchange?
Even the site isnt indexed in google search until the first 10 pages, and the site can't be opened on my side. It's very strange how 5 million users found this site in the first place. Or, sure it's a tough job if the OP has filled the database with that many fake accounts since it was founded.
Btw, archive org explains something else what this service was.
web.archive.org/web/20130401000000*/bityx.com
archive.is/bityx.com
I haven't found the website itself looking through Google since that's I usually do so that other related articles or websites to it will also come out but it seems that there were none.