No one said anything about voting or benefits? That's an entire different discussion.

It's just that, in layman's terms, a pardon means "you did nothing wrong", whereas a commutation means "you did something wrong but were sentenced too harshly". As far as I know that's also what it more or less means legally (with some nuance).

I'm absolutely not a fan of "tough on crime" sentencing, but he absolutely did do something wrong, even if we ignore the contended "murder for hire" claims he should have been sent to prison for a number of years (personally, I'd say about 5-10 years). This is also by Ulbricht's own admission by the way.