I suppose it is a cheap way of marketing - most of us now have 'all you can eat' texting plans, so there is no real cost involved. It may even be effective - if it wasn't, they wouldn't do it. I have a few 'regulars' that will reach out to me when it's been a while or if they come into town, but those are personalized, directed at me specifically and I am okay with it - not the big blast 'throw jello against the wall and see if it sticks' approach you mentioned. They should remove you from a mailing list if you request it, if not they can get into a fair amount of trouble (TCPA applies and although I am not a lawyer, I understand that it has teeth to it if they don't have your prior written express consent...) Most mobile phones now have the ability to block numbers - if they won't stop misbehaving, you can try to block the number.