The article doesn't mention whether there were any ransom demands. It is kind of pointless to do a DDOS without any ransom demand (unless you are an unethical competitor). In any case, they have got cloudflare now. It is a minor irritation, but better than not being able to access the website.
Point is that people don't believe anything that comes from Bitfinex anymore. It's a sensitive spot as people have not forgotten yet what has happened. Back then before Bitfinex announced they were 'hacked' they went offline a couple of times. If the website is inaccessible, then it will bring up bad memories for a lot people here. Another possibility might be that an entity is trying to scare off people by taking down Bitfinex and then to push fake news articles into the net to get the price down. People will do everything to get the price down.