Nice feedback on Android market (yes the issue is that I sold mostly on tablet). I don't agree about cloning - what is difficult is to have a good/large user base and being featured. Cloning will not help you a lot for that. Gaming the app store (at least the ios app store) is not easy at all (or very expensive and not applicable for this kind of app). I don't think the trick you describe would work.
for what it's worth, i wanted to buy your crosswords on android, but your version there is incredibly dumbed down. I finally got an old ipad a few months ago so finally bought it there.