I've been trying to find real profitable niches to promote using PPC with ROI =30% or more but I haven't found it yet. I've noticed a lot of affiliates don't share their niches. But I don't ask to share keywords, landing pages or else secrets. There are 1000s of registered affiliates on DP and in this section" affiliate programs" mostly everyone talks about what are the best affiliate networks which they know and how they promote ringtones, dating, payday loans, healthy products, crappy clickbank e-books, etc. We all know succesful stories how AJ22 and Webgenesis make a lot of money on ringtones, how Trypp makes big money on dating and a few other guys which make good money promoting clickbank e-books. These guys I've mentioned about are using mostly PPC. But what about other niches. Is there anyone who makes $100s per day (pure profit) promoting other not too saturated offers using solely PPC? What else topics are you promoting with success via PPC? Mostly big affiliate networks are saturated now and offer about 10 types of offers like ringtones, dating, payday cash etc. These are the top paid offers but very saturated.