Hristian, that’s another great approach. I usually don’t create new pixel(s) unless it’s for a main ecom product a business will sell. Otherwise I find I end up with dozens of pixels in the end for smaller campaigns/promotions, which can be a lot for a smaller marketing teams to manage.
I like emails because it’s tied to a person’s FB account. Even if it’s a multi-use PC/Mac in a home, I can target each person using that machine. If a cookie dropped on that machine, others in the house won’t see my ads anymore. I don’t mind the extra 2 minutes work to upload an audience on FB, if it means I can target ever person in a household. We find this issue out in my last startup and making sure you don’t have cookie exclude everyone on a multi-use PC/Mac.
You can use that audience list for targeting later down the road and even build a lookalike audience off that list to grow your business. I find emails lists better to build a lookalike audience off on FB than a pixel remarketing list, especially if you’re in the B2C space.