Very detailed response..
i never had the pleasure of dealing with poloniex so I omitted their part.

The only time i had to come to HitBTC when i wanted to buy some smartcash and suffice to say that it was a rather painful experience.. dont know how or why people are still using their exchange services for coins that they can easily get their hands on more stable exchanges like bittrex or binance.. nevertheless, it seems like a plausible cause when you say that they are gambling and big investors are just playing around it on hitbtc..