I have a quality niche board, with some of my own art, and lots of orangised under one roof meme repins. I'm not sure if anyone views them, but i only ever get a once in a blue moon comment. That doesn't stop me from uploading and using it though. I'm not sure what it takes to break through with pinterest, I have digital products listed on my board too. But not very many. I'm just going on the presumption that once you do beyond MUCH more than what an average spammer person has done in a few days, then the pinterest algo will favour you better. I don't know any platforms that don't reward original content, and love spam. Just keep at it. If you have a business to promote, then promote it, and make it original, without caring if anyone is looking at first, because they probably aren't. Excellence and achievement take time.