Did this drop of ETH and BTC affected your funds raised?I mean your ico was on while prices were much higher.
Maybe they bought tether with the funds raised.Tether is way to go during this market.
I doubt that projects sell their funds or put on the exchange while sale is on,even though going into tether was a good thing to do few months ago.
lol you are creating the worst scenario if you are getting the funds in TETHER form. Tether is a centralized currency and the developer can freeze it anytime if they are suspecting it as suspicious amount. Tether is the worst way ever i seen.