Spam is the biggest threat to organic search engines, whose goal is to provide quality search results for keywords or phrases entered by their users. Google's PageRank algorithm update ("BigDaddy") in February 2006—the final stage of Google's major update ("Jagger") that began in mid-summer 2005—specifically targeted spamdexing with great success. This update thus enabled Google to remove a large amount of mostly computer-generated duplicate content from its index.
Another strategy to make money online is to become a social marketing manager. Being present on social media is key for any business that wants to attract new customers, promote their products and grow their following. However, constantly posting, liking and commenting on the numerous social media channels is extremely time consuming. More and more businesses are recruiting social media managers to run and organize all their social media. And to save money, social media employees are often employed as online freelancers.
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.