The shared post was always using the same image before and was kinda boring and useless.
But I have now fixed that, if the first post of a topic contains an image or a Youtube embed then this image will be used for the share (the static image for the Youtube videos).
This means that for the classifieds at least, if you're putting something up for sale, at least one picture of your game/accessory will be posted with the share which should help motivating people outside of the forum to click and view your ad.
If there's no images, the usual image will be used, which is not really appealing to target buyers.
Here's what it looks like for a Youtube embed:
- Youtube
- Image