With a smaller playerbase, 2 days listing time on the Auction House is not enough time to find a buyer for your items. There's a good chance nobody who actually wants to buy your item will see it in time and that it'll either go unsold or bought for a too low price by someone looking to resell it. Having to pay a listing fee/10% fee while at the same time risking letting your item go for a bad price is just not something anyone is willing to do. Because of that, the AH is usually empty and not worth checking regularly. It's a downwards spiral of potential buyers not frequenting the AH due to a lack of good items and players not listing their good items due to a lack of potential buyers.

Here's a suggestion how to make the AH more appealing to use: Let players list their items for 10 days. As soon as a bid is placed, the timer sets to 2 days and proceeds to function like it does currently.

This way there's a much better chance that someone who is interested in the item will see it and you don't risk losing the listing fee multiple times. If sellers trust the AH more, they will use it more, which means buyers will have more of a reason to check it out once in a while, increasing the amount of trades completed through AH. More trust in the AH as a way to sell off items, more crowns spent on listing fees, more energy converted to crowns in order to bid.