With a lot of scam accusations against Fixedfloat and with this hacking news, I don't think they will be able to continue their business. The reason is not that they have lost a lot of money in the hack but it is due to that they are losing trust both by the mismanagement of them to resolve people query's, holding people's money and this hack could be the nail in the coffin for them.
They've got several days just after the hack to get back on the business but I don't think that they have got plans of getting back into business. I'm always checking if they've been back and with that period and window of time, I've seen that they've been back for a few days but they've disabled a lot of crypto to trade including BTC and after that, they've never been back.
If this hack is an insider's job, then it can be an attempt for a scam exit and we never know that they may come back again with a new name and a new domain
I am not even thinking about that but with such complains and how the business and process goes for them, they'd probably decided just to wait for some big deposits and did what they have to do. But who knows if they're going to be back again and will resolve all of the concerns that are thrown to them and clean what they have to clear.