Some information regarding this issue would be welcome.
People want to know when sales are coming before they spend money whit food and other unnecessary items.
I mean if i know a specific sale is approaching i would be more ready then getting surprised and have no money available to get it.
Also maybe consider making the "gamble" a little more transparent whit % drop rates on its announce.
Also game is losing players and an alarming rate, maybe consider instead of selling items only to also make some kind of advertisement or game promotion to encourage at least 1 on each 50 new people to spend some euros to play, since you need about 2K euros nowadays to have a "decent" account.