They allegedly caused hundreds of of millions of dollars of theft and damages, including $300 million in theft/damages by just three of the corporate victims. They stole 160 million credit card numbers. They stole freaking Diners Club cards. So it is difficult to make any sense whatsoever of your suggestion that the "punishment" does not "fit the crime" given a possible 30+ year sentence.
Perhaps you are missing the point that such attacks can cause many times more $$$ damages than the crime rings take in profits, and that even if the responsible parties or some fraction thereof are somehow identified and brought to justice, often there will be nothing to "confiscate", the assets having been effectively laundered or simply spent already on things that can't be seized and sold. Altogether it's immensely destructive of real people's money and livelihoods, and it's not as if the victims can be somehow made whole just by "confiscating profits".
You seem to be under the illusion that since it was done via computer the crime wasn't "real"; perhaps this is misplaced pushback towards the idea of seeing theft of entertainment media as a crime. To remind you: that's not what was going on here. We're talking about people stealing money in extremely large quantities. That is one of the very essences of illegality that we punish people for.
At any rate, sentence are chosen only upon conviction and based on the facts as developed at trial, so there is no way to know without quite a bit of further analysis whether any of them could actually see such a sentence. Federal criminal sentencing is intended to serve a variety of purposes, including punishing the wrongful act and deterring its future commission, providing a sense of justice to the victims of crime, and impressing upon the defendant (and society) the seriousness of the crimes committed.
Ask yourself whether a man who has stolen 160 million credit cards is really going to be "reformed" after 5 years in prison, or whether that's just a quick trip back to Moscow with some sweet new tattoos and a new network of Russian American mafia/criminal friends with which to further his underworld career.
And then please, for the love of God, question your motives.