Almost $32k received based on the current btc rate.
That's nothing in terms of impact on Bitcoin price
I'd say that's a fair amount of money for making an encrypting trojan.
It paid well for the time they spent making it, especially well since they left an easy to find way to shut it all down. Also I don't think the price decreased purely because of this hack. It didn't target the Bitcoin network, so there was no reason to panic and the price was peaking for days. People were waiting to take their profits.
Well, we don't know that for sure
Maybe, they didn't pay anything at all and just stole the code from the Alphabet agency (maybe, it was one of their employees or something to that tune). We don't know either if they will be caught but if they do get caught eventually, no amount of profit will be worth it unless they get off cheaply while extorting literally millions of dollars (like Cryptsy scammers did). Regarding Bitcoin prices, I'm never tired to repeat that with higher price we should expect higher volatility, even in relative terms, so the price swings of 200 dollars shouldn't surprise anyone any more. My best bet is for 1,200 dollars as a new support level and 2,000 dollars as a new resistance level