There are loads of resources for making money online as an affiliate. You could source products from ClickBank, Commission Junction, Rakuten Marketing, Share-a-Sale, Impact Radius and many others. Plus, many of the larger companies have their own affiliate programs as well. Do your due diligence and find the right company with a relevant product or service to your audience that you can sell as an affiliate.
6. IZEA – IZEA works in addition to a blog or on its own. You get paid to blog, tweet, take photos and take videos. The pay is mostly based on your following, so if you want to make money with your tweets, you’ll need to grow you Twitter following. Likewise, if you want to make money with blogs, you’ll need substantial blog traffic (more on blogging below).
Once you sign up to become an affiliate with ClickBank, you will immediately be able to browse the different products available to sell. ClickBank has tens of thousands of products available, so in the beginning it's helpful to search by niche and commission percentage until you locate offers that you want to promote. Make sure you take the time to look at the vendor's sales page before promoting their product. They might be offering a 75% commission rate, but if their website doesn't look trustworthy or put together you aren't going to generate many sales, no matter how much traffic you drive their way.
The General Data Protection Regulation (GDPR), which took effect on May 25, 2018, is a set of regulations governing the use of personal data across the EU. This is forcing some affiliates to obtain user data through opt-in consent (updated privacy policies and cookie notices), even if they are not located in the European Union. This new regulation should also remind you to follow FTC guidelines and clearly disclose that you receive affiliate commissions from your recommendations.
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.