Thanks so much for this article. I manage several sites for one client and I'm getting silly seeing the same ads for the same plugins every time I go to admin, not to mention my client occasionally goes in and wonders what's going on. It reminds me of patients going to their doctor and telling them they saw an advertisement for some medication they don't need. I just installed it on all but one of my client's sites - that way, I'll only see one and that's okay.