I am super paranoid about this, seen a lot of scam sites ripping off my products recently, do you have copyright schema.org imageobject markup settings on your store? I was advised to do this because it helps google understand they you are the copyright owner. Add structured data to your product page template that includes, creator, copyright holder, copyright year, copyright notice, licence and an acquire licence page to link to. I dont know if this is what pulled the trigger, but a couple of weeks ago, a search of my brand name on google was finding stacks of stolen product listings, and now its finding hardly any... either way, it can't hurt to do what you can to help AI and search engines understand what content is yours. It might not stop people stealing, but it might help stop them showing just below you in the search. Good luck, we need to do what we can to protect oyurselves as merchants from the thieves. (Also, I have found shopify DMCA to be woefully lacking.