Roman Seleznev: Did the Punishment Fit the Crime?

In 2019, Roman Seleznev, a 34 years-old Russian national, was sentenced to 27 years in prison: A sentence that’d make any criminal quiver. Seleznev's deeds had a horrendous effect on the 2.9 million individuals whose credit cards he stole and sold to cyber criminals for identity theft and financial crimes. On one hand, it’s hard to imagine any nonviolent computer crime worth 27 years in prison. But then what is an appropriate sentence for such a man as Seleznev?