I starting using this app 2 weeks ago, was amazing but the earnings dropped.
http://i.imgur.com/dwu66l8.png

Also the benchmarks doesnt seem to be right. When is mining ETH/ETC it automatically changes to ZEC and the earnings are $9 - $10/day, but when i manually deselect ZEC and mine other coins the earnings are $13 to $14/day. (it just happen again while writing this)
http://i.imgur.com/jJQFaPu.png  http://i.imgur.com/oCB6Hlu.png

At the web says +13$/day but at the end its $9-$10
http://i.imgur.com/teE5ncc.png

(dont mine my poor english, not my first language)