Silo: +10 (sell 10 items) button
You just used your daily ad to double ingredients from collection run, and you've done with the +80% bonus from your favorite skin on, because you're smart.
You might be smart, but you're also like that dear old lady who never throws anything away, therefore your silo is always at maximum capacity minus one.
Now, if you want to play another map, you have to burn your finger on the + button to sell ingredients.
Wouldn't be more comfortable to have a "sell x10 button" ?