This is a kind of attention seeking, when something gets such a high demand more users will prefer to invest once it get listed to the exchanges for trading needs. This seems to be the first initial exchange offering through bittrex, already Binance have listed few. Can participate on more such IEOs in the upcoming days as every exchange will begin the service soon.
It's a new trend now, everyone is gunning after Binance so they need a lot of catching up to do.
As far as Veriblock goes, it's more of a hype that's why the sale was close in 10 seconds. Probably a lot of investors are really waiting in that faithful day to get inside and buy so I'm not surprised how quick the token sale has ended.
So let's see how other exchanges are doing now, specially that this could open doors for investors to make money again.