While for the moment you're a forum lurker....what you'll find is that when the majority of your posts get deleted you'll be back to being a forum newbie again.
You reckon you're not acting proactively?....i'd say that you are....simply by listing on Ebid you are doing your bit to increase the sites overall appeal to new buyers....and those existing ones.
If you're still selling elsewhere, then this is good as it enables you to raise awareness of Ebid via your sales there....you know the sort of thing , put advertising literature into the packages etc....but a word of caution....don't be tempted to list only your better items on other sites....Ebid is just as deserving as quality listings as anywhere else, and you'll actually have greater success by doing this as well as the potential to keep more o the final selling price for yourself.