Suppose that an app developer, A, finds that a website is distributing copies of A's copyrighted app, without permission. A has sent DMCA takedown notices to the site, but has received no response.
Suppose that the site also hosts Micro$oft apps and apps by other major companies.
Suppose alos that the site made some clever download link system where the actual files are downloaded from random servers that are not easy to track. The links expire so links cannot be shared to the operators of those download servers: