I think they have taken Bittrex exchange for buying token so i dont think that they are in need of escrow as the pre sale purchase will be their in Bittrex exchange wallet until their terms are met apart from that they have used escrow for signature campaign.

It is nice to hear that you have taken in notice of price fluctuation of ETH and on that you have taken steps to take the token value in calculation of fiat currency adjustment against the ETH payment of buying token value.