Excellent stickers but PLEASE stop sending promotional stickers & coasters

The stickers I ordered are excellent, but I hate having to throw away the extra Sticker Mule promo stickers you folks enclose with every order. Recycling the promotional coasters that are always also included is a minor annoyance by comparison and at least keeps them out of the landfill, but once a customer has received promotional materials several times, that's likely enough. Maybe you could let people check a box to opt out of getting them included with their orders.