So, even though you've clearly stated, as I did, that these are spin-offs, remakes, or clones, they're...not?
Just a quick point. Clones and near clones make up a rather small percentage, of the total for-pay OSR products available. 10%, perhaps, if you count every little homebrewed ruleset on Lulu, that most people have never even heard of.
edit: A year ago, I stopped counting the number of non-clone releases. They were at 200+, then.
Since I continually reference "20 years" that would include 3e. If you bought and enjoyed the previous edition you are not in the group so far gone from the modern marketplace that I'm referencing. If your last edition was 2nd, well, yeah, that puts you pretty out of touch.
A large number of OSR folk have experience with newer editions. I ran 3.x for seven years.
But, even given that there's a segment of "old schoolers" who will not, under any circumstances buy a WotC product, so what?
There's a segment of "Old Schoolers" who won't buy retro-clones! There's a segment of "Old Schoolers" who won't purchase a modern module, or setting book, that's designed for OSRIC, or LL, etc!
And there's OSR bloggers who posted pictures of their shiny new Pathfinder Starter Box Set!
So, you seem to be arguing that because there's a group of people "so far gone from the modern marketplace" that they've never purchased a WotC product, that the company shouldn't attempt to market to the OSR, at all.
That's the part of your argument, that makes no sense. And frankly, with no insult intended, I submit to you that you're just not familiar enough with the OSR to make a cogent argument, about what that market might or might not do.
Now, if you want to argue that the OSR is too small, to risk alienating d20 gamers for, then I would agree.