Bold Brain uses your store's purchase information to come up with offer suggestions that it believes will work well on the site. The app identifies purchase relationships between products by finding multiple orders with the same two items on the order. For subscription offers, it searches for customers ordering the same product multiple times within a certain time frame.
If Brain doesn't have strong enough purchase relationships, it will not suggest any Insights within its admin. The app needs significant order information before it will start suggesting Insights.