For me, if the company is awful, for preservation purposes or if the owner doesn't care. I hate streaming services. I'll never pay for any of them. And when I steal from an artist I like, I'll usually be buying something actually worth the money from them later.
I pirate, but it's mostly because i live in Serbia and some dubs don't have any official releases and even if they do, they are rare. And for some dubs pirating is the only way you can watch them.