Rather than making money through subscriptions, YouTube channels are based on a traditional advertising system. Meaning the more viewers you get, the more you make. Once you’re approved for the YouTube Partner Program and can start including ads on your videos, with every 1,000 views, you will make approximately $2-$4. Which might not seem like a lot, but if you have 100 videos with 5,000 views a month each, that would be $1,000–$2,000 already. Just imagine if your videos start hitting millions of views!
In the past, many affiliate marketers focused on a catch-all approach, offering traffic up to hundreds or thousands of sites, even if they had little authority or traffic to give. But in 2018, advertisers will laser their focus into smaller groups of highly credible, targeted, and popular influencers. To map your strategy, focus on a few key influencers in your industry. Start with them, then nail your niche before expanding outward.
If you have pop-ups and optins on every page, I would have to think that it would be a lot harder to convince someone to link to it. Especially since the pages where you have your optins (and probably receive the most traffic) are probably the same pages that you have your best content on as well that you'd be hoping to pitch in your outreach campaign.