They're getting feedbacks from their spends or whatever their activities are if they're not spending, and they see what's working, and then they do more of that.
يحصلون على ملاحظات على ما ينفقوه أو على نشاطاتهم إذا كانوا لا ينفقون أي شي، ويشاهدون أفعالهم ليكرروها لاحقاً.