It is an action to emphasize the piracy is illegal and they will hunt you down for it using state resources, not matter the sentence.
This guy will be on their shitlist at least for a decade now. The next sentence would be times worse. But the best effect of this is that you sentence one guy, no matter how light the sentence is, then 1000 teens are afraid of ever thinking of piracy. Surely some of them will say “lol look at the joke of a sentence, so keep on pirating” but a lot won’t.
What’s better yet, a lot of those afraid teenagers will internalize piracy as both illegal and immoral.
It is also an honorable course of action. Developer gets paid for their work, you use quality service with convenience.