The buyers do not belong to you. They belong to FAA they are not going to do anything that promotes you, the individual artists as much as they are going to promote FAA in general.
You will be much better off just worrying about promoting your own art, promoting you and not trying to get FAA to do it for you. They are not going to do that until you become one of their top sellers.
You have been there ten years, you should know that already. It has been that way for all of the eight years I have been here. I don't see that changing.
I bet FAA is doing something that is generic promoting FAA. To customize stickers for what ever percentage of 500,000 artist that make a sale any given day, week, month is not going to be cost effective.
How much would you be willing to pay for the additional cost of doing that? Just curious.