That's correct, at the moment you can only add an app that you can claim ownership of (vis dns). The current list was manually added by us + by devs who have listed their apps on our site, but we'll be rolling out a more scalable solution soon, along with some better curation. I think that's a good idea to allow users to recommend listings - we'll look into adding that soon. Would love for you to create an account so we can keep you posted on this feature / other progress :-)