I experimented with AppyFridays in April on Mac App Store (free for a weekend) and the app got spot n.1 in its category in US, Italy, France, etc and made it de

I experimented with AppyFridays in April on Mac App Store (free for a weekend) and the app got spot n.1 in its category in US, Italy, France, etc and made it definitely in the first 10 worldwide (Music category app, got ~10K downloads per day), bouncing back (slowly) to the normal (5$) price made the downloads return to the "a few per day" it was before (may be slightly more). On the plus side, the promo was free (i.e.: no additional money to be part of it) and they had no requests for revenue sharing or the like. Just a data point, I think that the app in itself plays a role... gaming and iOS are probably a better market for this kind of promo. (and, yes, app discovery is a serious problem).