There is no one-size-fits-all answer to this question, as the answer will depend on the specific blog and its content. However, a majority of true crime bloggers report making a significant amount of money from their blogs, with some reporting that they earn more than $20,000 per year.
While it is not easy to make a living as a true crime blogger, there are several ways that blogs can generate revenue. Some of the most common methods include selling advertising space, charging for access to archives or content, and charging for guest posts.
Additionally, many true crime bloggers also sell merchandise (such as T-shirts and mugs) through their websites or through partnering with companies that sell such products.
Overall, it appears that true crime blogs can be profitable businesses if they are well-managed and have high-quality content. While it is not easy to build a successful blog from scratch, many aspiring bloggers can learn about how to create successful content and monetize their sites by reading online resources or consulting with experienced bloggers.