Why do most new Altcoins list on Bittrex first before other bigger Exchanges like Poloniex.
Poloniex isnt clear in what coins they add to what conditions.
Got the feeling if you offer a big bag of bucks as developer they will add the crypto coin sooner.
The only new coins Poloniex has listed this year are ETC and BCH, and they did both reluctantly. I think a coin would have to have huge volume for them to consider listing it. Especially as they are barely managing to maintain the wallets on the coins they do list.
BTW, if people want a huge choice of alts to trade, try HITBTC - they have coins that no-one else seems to have.