What do nation who devise computer virus possibly acquire out of it?

What do nation who devise computer virus possibly acquire out of it?

some of them intern time. some of them are people who attain fired from their job and as revenge they write those things...
Money
Respect among other loser virus maker.
precious botnets
it`s mostly an ego thing, they similar to to show how "smart" (or dumb) they are.
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