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.
Mistake #3: Giving your friend’s product a glowing review without actually being familiar with your friend’s product. This happens a lot in the affiliate marketing (and book marketing) world unfortunately. It’s a “scratch my back and I’ll scratch yours” type of situation. By all means, give your friend a glowing review, but if you haven’t actually read their book or taken their course or tried their product, don’t talk about it as though you have. Readers deserve honest recommendations! (Here’s an example of me helping to announce the launch of my friend’s book while being clear I hadn’t read it.)
When promoting affiliate offers, just make sure you are fully aware of all the terms and conditions attached to your affiliate program. Some programs can be strict about how they allow you to promote their products. For example, some may limit you to banner ads and links only, while others will allow you to use paid advertising, but won't allow email marketing.