It looks like this is free (the pricing page isn't up yet), as I was able to issue a certificate and not have any charges show immediately.
BTW, it looks like there might be a lot of people flagging this post (raced to position 1, but then quickly dropped to position 5).
I'm not opposed to people flagging things or anything, but I'm curious as to why a post like this would be heavily flagged, if that is indeed what is happening.