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.
Poloniex used to have a huge number of coins, but in about March they culled a lot of them as they weren't doing a lot of trade and were just gumming up their engine. When a trading engine gets to a certain size with lots of users, you can't afford the small coins, because they slow the whole thing down.
Kraken has just removed a whole bunch of pairs too, to improve the performance of their engine.
With Bittrex - they do list coins, but they also aggresively delist them if the volume of trades falls in a two week period.
As an exchanger delisting inactive coins would really be always suggested or a thing must do by them because if they would just let it be there on the exchange it would really slow things up and would really affect their service. Talking about bittrex most coins or some coins do easily get listed on their compared on other reputable exchange too like polo. I dont know regarding on their policies or guidelines to be listed but dont matter at all and we should be thankful on that.