@JDM,
That's a good question to ask @Oyvind in the following post below. Short answer is (from what I've read), it depends on where you live, but Oyvind is great with responding to special instances, like if you live outside the US or Europe.
Ron
The edit option goes away after a set amount of time. It used to be relatively short, about 15 minutes, but I think @Oyvind may have extended that.
Ron