There are two ways you can make revenue using advertisements either you use ad network like buysellads / Adsense or you put premium ads for sponsors. For sites like IH which have content focused on a specific niche ad networks can't generate a significant amount of revenue. So how do you find sponsors? what was your process for contacting and pitching them? What worked and what didn't? How do you decide how much to charge? Did you automate this process? How? How much time did you spend on this? Sorry, a lot of questions in one post. But There are a lot of IH's who have some niche-focused website they often fail to monetize them.