I loathe Walmart exclusives. I haven't really had too much of a problem with exclusives in general, but every time I hear Walmart is getting an exclusive I want, it triggers a solid wave of disgust.
My most recent ludicrous example is R.E.D. Starscream. I don't think R.E.D. is a particularly high-demand line in general, and I had mine ordered within 2 minutes after its reveal time last December. All the delays were no big deal, but then I got a cancellation notice out of nowhere last Friday. Not really unexpected, just Walmart strikes again.
No, what really put this one over the top? The very next day, Starscream was in stock and available to order. He's sitting on my desk now. And he's still available to buy now, albeit with Walmart's random $10 markup they slap on stuff with no apparent rhyme or reason. So if they're so abundant, why the hell did they cancel my order!?