Is Bittrrex becoming a scam exchange? Or just a sponsor exchange that doesn't care about the fact that those coins are scam or not. It is time that Bittrex is doing some more research and don't list any ICOs that were done on crowdsale.io, check the coins, check how many coins of that list were scam? 100%? correct.
They wont. Richie made it pretty clear they dont want to be a "centralized authority" to decide which coins people want to trade or not, so give him 3BTC and you can have everything listed except asset-backed stuff. Which is - of course - the easiest way to negate any responsibility for the crypto ecosystem and to make most of it.
Personally I dont think that busines model will last. People are getting really pissed and poloniex, which was much smaller in relation to bittrex 6 months ago, is not that far behind anymore without listing all that trash. But what do I know.