Yeah it's a challenging market. Just to add another data point, we're small indie (games) developer, we spent over a year on our first title with very little marketing budget and these are our sales figures from our launch: http://www.gamasutra.com/blogs/YacineSalmi/20160519/273030/E... In short, decent sales but not enough to recoup our costs. Still, we never expected that we would hit gold on the first try. I think…
Top 25 game free to play game (which were games similar to Summoners War or Star Wars™: Galaxy of Heroes) earned about $15,000,000. There's a huge gap and this is apparent in what games actually gross a lot.
These are both iPhone only numbers.