Umm, I'm pretty sure this is the wrong calculation? This is from their FAQ
With the BTC hardfork around the corner , is it best to wait to invest, as BTC may be higher now than it will be in 3 weeks?
Actually, the BTC/USD price will not be a factor -
We are doing all calculations for token distribution based upon BTC price with no consideration for USD or other fiat pricing.
1 BTC on Oct 2 = 1 BTC on Nov 2.
So you wouldn't be evaluating with ETH@250, you would be evaluating what how much BTC your ETH converts to on the day of you sending it in. And BTC value is "pegged" to USD - how they determine how much they've raised....(probably on the date of the audit/closing). They don't care what the value of your BTC is, only how many. So your 1 BTC from when it's $2000 is worth the same as the 1 BTC that you buy today (~$5700). Both BTC get you the same amount of DRGN token. So contrary to what they are saying, the BTC/USD price will be a factor for people that's buy/sending btc/eth into the sale.
What do you mean "your 1 BTC from when it's $2000 is worth the same as the 1 BTC that you buy today (~$5700)" Of course it is, there aren't multiple values of BTC. Are you saying that it isn't fair in some way because some people invested earlier and their investments appreciated in value?
I don't think they are claiming that the value of BTC doesn't fluctuate relative to USD, they are just not taking that into account. You are thinking of it as if BTC to USD has to be done, I actually like the idea of BTC being the standard.