The people who bought the BTC are long-term and big investors. They're looking to acquire a large amount of BTC at once. Those auctions are the perfect way for them to achieve that goal. They won't sell the BTC on the market, they couldn't even sell them a tiny profit. They hold those BTC. Sure, the auctions may numb down quite a bit of buying pressure, but I advise everyone not to put too much weight on the auctions' effect on the price!