I didn't know they are doing that. I don't use exchanges often now, but I actually enjoyed my experience with hitbtc. I sold $1k worth of tokens for bitcoin and successfully transferred btc to my wallet without any issues, ID or whatsoever. It was cheap, fast and anonymous.
If they are just removing whatever coins they wish, I think it's an understandable move but a very unfair one. Hitbtc has a high listing fee for tokens. The team has to pay 20 btc or more to get listed! The exchange gets the money, allows trading for some time and then removes the coin. If that's what it is, I would call it a scam.