Hi zalberico, I'm h0p3. I can't say I get it either. My wiki is a place to store stuff and to tell myself linked stories. Maybe it is a hypertext castle, a rabbithole, a garden, a mind map, an exobrain, a Zettelkasten, an existential mirror or conduit. Despite significant effort, I'm not sure how to describe it well enough. It's a site I like to see. It's where I do muh thinkin, I tellyawhat.
Also, Fraidyc.at works with Tiddlywikis.