Smacks of conspiracy theory - it's hard to credit WotC with a coordinated anything, let alone one rating a coupla 'very's. ;P
But, it does also ring of the "Illusory Truth Effect." Repeat something often enough, and even if still obviously false, it becomes more familiar and less implausible.
Plus, if it's not some fiendish plot, you have to give them credit for trying.
In one class I taught a long time ago - I had this one college kid who was 'fight the power', 'advertisers are slime', etc...I assigned them to do an ad.
His was the most openly manipulative ad and not at all by a little. WotC seems to have a similar problem in that they ran a very manipulative marketing campaign. And presumably someone at Hasbro signed off on it.
I don't think they're doing it deliberately. I just think they don't really know what they were doing on a whole lot of levels.