That's just a matter of perspective and your own unproven fears.
Has anyone proven this is a scam?
It's not Bittrex's position to determine what is a scam and what is not.
They are simply the escrow.
~BCX~
It is a very interesting situation bitterex is in, and the community I see. People praising anonymous unregulated decentralized currency, but when they gamble and think they got scammed some members have been expecting and demanding regulation, accountability, and personal information. I think some precedents might be set here. If I was bitterex admin I would have demanded way more from dev to protect myself. Very risky escrow/investment type thing this ICO