I think a power analysis is incorrect here. Zara can and most likely will be held accountable for any illegal acts their lawyers committed by trying to intimidate the indie artist.
I am holding up the simple concept of property rights whether you are a big, and not necessarily bad, company, or you are a struggling moral artist. If you download torrents for any reason, it is still against the IP laws that protect them, even if you are doing it to make a statement. You are in effect against the concept of IP. Now, if you turn around, and call the big company evil or bad, because one of its 20,000 designers lifted a design off of a web site, how do you justify the apparent contradiction or hypocrisy.
I don't say this judgmentally, since I have struggled with this for decades. I buy indie games, donate to worthwhile endeavors when I can, and hope for the same reciprocation. I see the point for change and looking for new ways of doing business that benefit both sides of a deal. After all, the definition of a good bargain or deal is when both parties shake hands after exchanging goods and services, and each feels they received good value in the transaction when walking away.
To be honest, rigorously honest, sometimes demands calling ourselves out on our own contradictions and addressing them. I see to much dancing around the truth to justify what is currently stealing.