Forging relationships with bloggers and Internet Marketers outside your niche is valuable. Let me take an example to illustrate this point. Let’s assume that you have a blog providing WordPress tricks and tips. You recently developed a WordPress theme and actively promoting it in your niche. Since you have been blogging about WordPress you have a good reader base to sell your product.
But, one issue that you might face is the fact that your readers are already well informed about WordPress. They know about all the other cool themes that exist in the market. This means you have to provide lot of reasoning on why people should buy your theme over others. Since you are in a competitive niche selling becomes more challenging.