I have an app that floats around the top 200 in the travel section but it doesn't really bring in much (i'm only using iAD and not charging for the app). I guess the travel section is probably a little easier to crack than some sections though.
I made really bad experience with iAD and other monetizing frameworks. 0,50$/day and >2k impressions. I think iAD works only with iOS games. Can you share a link?