This is unlikely to happen. I've had to say this on a few topics, but, unfortunately we're a business. We can't build a business on what is meant to be a subscription model (a month long upgraded account) that instead lets people just use it for the exact times that they're online. No other subscription model works like that.

Instead, we are looking to increase the benefits of subscribing monthly, and adding some extra perks (monthly unique items, CW vouchers, etc) to make it worth it not just for auto pricing / questing :)

Locking up as there is an official answer above.