Seems to me that the fear over Blackhawk is from people getting shutdown for buying too many online. unless you filling out a form everytime you buy one of these at the mall I don't see how Blackhawk would know if you bought too many at the mall.
Until I see credible evidence that Blackhawk cards will no longer work, I won't get all worked up about it. And even then like VR vanilla and everything else we'll just adapt