It does.
With EOS already floating on Kraken and Bitfinex, I would suspect that Eth/round would follow the market i.e. If the price of EOS is higher then ico price on the exchanges, then contribution will also exceed 6400ETH and vice vesa.
Do you for see a chance of major arbitrage between each round and the prevailing market price at that time?
i'm quite sure ppl will game this system.