not sure where you saw 170k ETH 6h before public sale, only ETH i saw before public offering was that from bitcoinsuisse 56750(25%)

The full funding scope was set at 220000 ETH and the pre-allocation servered through BTCSAG was set to 56750 ETH (25 %).
Bitcoinsuisse got 181k
even so, they did it for their customers (me included). 25% was guaranteed by presale contract, rest was first come first serve. bitcoinsuisse had their presale offering open for customers almost a month now.
ps. they are pro in this business, no wonder they were first to buy.