We have always seen the same with the BTCC Mint auctions. Denarium being based in Finland and BTCC Mint 'was' based in China, you never know if they put out Facebook ads or tv commercial slots or the equivalent in their local forms of social media. This brings newbie accounts here and maybe we as the skeptics (its not a bad thing to be one) need to establish an unofficial official rule or two for future auctions, something easy to follow and easy to abide by.
The company behind Denarium, Prasos, has multiple business lines in the crypto space with Denarium being actually the smallest one. Prasos has over 80000 customers in its services at large and especially recently (due to Christmas), and this being an important auction, Denarium stuff has been pretty much pushed through all the other services of Prasos as well. That's basically the reason for the newbie accounts, as these are promoted outside Bitcointalk quite a bit.
In this auction there actually wasn't any true new accounts which was a bit surprising to me. The winner, even though technically a newbie account, has bid (and won) in our auctions previously.