There’s another benefit to how your “Anonymous” operates. No one is going to reverse engineer the work in their portfolio. Because that’s a valid concern.
I used to work with a prominent SEO company. We did awesome work for some Fortune 500 companies with spectacular results. Until they decided to re-vamp their site and add case studies.
Because “social media,” you know. Content is king, blah, blah. What happened next is text book. You’ll notice I said “used to..”