Anyone know why flt is frozen on polo??

I want to buy more cheap coins, flt coins that is!!
I don't use poloniex.com
What does "frozen" mean in this terms ?
Frozen means
no-trading/transfers are allowed, hence the term "frozen"
And why should they do that?
Not like its a scam coin, or what?
They usually put the markets as frozen if they suspect that the wallet is on a wrong blockchain or just need to update the wallet.