You can manage the flyers you see in the reebee app by using your custom Favourites list. Only stores of your choosing will appear in this list, and it also helps you filter search results!
Within a flyer, tap the heart in the upper right corner to add that retailer to your list of personalized favourites, and tap again to remove it. To view your favourite flyers, tap the heart at the top left of the home screen and you'll see that only the retailers you've added will be included in that list!
In addition, when you apply the "store" filter to the results of a search, results from retailers in your favourites list are placed at the top (alphabetically) and are marked with a heart.