Why do most new Altcoins list on Bittrex first before other bigger Exchanges like Poloniex. Are they less strict or what? What exactly is happening.
As far as i know yes, bittrex is less strict in terms of listing.
Also, right now bittrex has more volume consistently than poloniex. Since all the troubles that poloniex has gone through and still people are complaining about their withdrawals, deposits and verification, bittrex has gained a lot more attention and appreciation(though they have their issues too).
Pretty sure that on bittrex you can pay a flat fee to get your coin listed too.