A lot of people just want the character. So the more releases Hasbro makes, the less valuable the first one will be. Though the first FS Applejack may always be more sought after than other FS of the mane 6.
As someone else said, there was another release of her but it didn't make it to the US. But then there was the Power Ponies pack which was a Target exclusive. And now there will be the new FS.
So not nearly what she was worth before but definitly still a lot harder to find than the other mane 6.