I will start with the skin idea that might not work as i understand its a way for ccp to sell direclty skin for real money.
The idea is to create your own skin to any ships and then being able to sell it to other players. Im very picky and i find it hard to find good looking skins, the one i prefer of all is the “bloody hands” one for the hel. When you open the similator, you see the 2 button (browser for hulls&fits/hardware and skins), when you click skin, the window on the right with normal “capacitor/offense…ect” behing displayed would then offer options for the skin creation. It could even require mats to do release it.
Second idea, books, or maybe a rework of the notepad including greater limits on things you can put (over 3900 letters) and the possibility to create books (guides for new players, links, story of alliances, way to make isk ect). in order for this to have any real value is to ba able to put alot of informations in it so to acces it ingames rather then having second screens to look at websites.
Maybe someone would have additional idea for the book part, so that some can sell for decent isk and really be part of isk dumping.
Sorry if thoses ideas were already proposed, i tried to look fast in here and didnt found it.