You might also mention to them that their status as major gun-grabber supporters is hurting them PLENTY and will get worse as more people find out about them. I haven't bought anything Hallmark for quite a few years because of the 2nd A issue and I have told friends who are pro 2nd A about it. I assume they have passed the information on to their friends.
I'm very sorry that this hurts good people like you and who knows how many others, but if they don't change the causes they contribute to, they'll never see another dime from me or anyone I can convince either. If they do change their ways, tell them to be sure to publicize it very LOUDLY.
In the meantime they are part of the enemy within IMO.