I've found that display ads can be a good supplement to shopping and search ads for replica products, especially if you're targeting a specific niche or audience. However, I'd love to hear more about the issues you're experiencing with shopping ads - are you having trouble with disapprovals, low conversion rates, or something else? Understanding the root of the problem might help us provide more tailored advice. Additionally, what type of replica products are you promoting, as that can also impact the effectiveness of different ad types? Have you considered using display ads to retarget users who have visited your site or engaged with your content before?