I think the author's point is that Facebook has become such a hollow, corrupted shell that they're not even aware (or even care) that they're recruiting the sam

I think the author's point is that Facebook has become such a hollow, corrupted shell that they're not even aware (or even care) that they're recruiting the same people over and over while they continually reply no. It's an open letter stating the author's point more than trying to communicate with a recruiting department.