I've purchased it, but I had a few problems doing so. I'd earlier purchased the stream for the original match and had the refund and, as my email address was already known to them, the website kept telling me that I needed to sign in rather than register. Only problem... there wasn't a sign-in button, only a register button.
Workaround if anyone else has the same issue is to use a different browser. Firefox gave me the sign in button where Internet Explorer didn't.