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.
You are exactly that right that it isn't fair, especially when you want to place a "dollar" value on the drgn at the end of ICO. BTC shouldn't be the standard imo because it prevents a standard platform for everyone to invest from. And also it seems like they are calculating how much they have raised by converting the BTC to USD, and then they want to back-assign how much drgn you receive by the BTC value...it just doesn't make much sense to have peg the drgn value to BTC. But this is the only ICO i've looked into, I'm assuming all ICO works this way....not a huge fan, but just my opinion.
Regardless, the previous quote from my post is still incorrect. It is calculated incorrectly.