No idea whats up with it. Gold was in place for the play-offs which saved hassle, there was then a binfest for those who WERENT signed up to Gold. There will be more time now to sort things, so a 2/3 day window would be expected.
Everyone who wants a ticket will probably get one anyway...
It wont be a STH free-for-all for any ST seat. A window would be 2 days long (probably) and i expect that to be at the end of this week. After that current STHs will then get first choice on remaining unsold seats, then you go through loyalty points/priority membership. It wont be first come...