Content takedowns work. But some operators re-upload faster than you can file.
DMCA notices, platform abuse reports, and search-engine delisting are the first line of enforcement — and they work for the vast majority of piracy. But a small percentage of piracy operations are run as real businesses: they have subscribers, payment processing, ad revenue, and enough margin to justify the overhead of re-uploading after every takedown. For these operations, content-level enforcement alone becomes a war of attrition. You take it down, they put it back up, and the cycle repeats. The second enforcement layer targets the business model itself.