As Todd Crawford of Impact Radius puts it: “Marketers will need to monitor their vendors and partners for compliance with the GDPR. Vetting relationships will be extremely important, as well as ensuring that each party and your company have the appropriate consents and disclosures concerning collection, tracking, and processing personal data of your customers. Intelligent tools will be key for monitoring the types and treatment of covered data. As 2018 nears, it is essential to ask your vendors and partners whether they are or will be compliant by the May deadline, and to provide supporting details concerning their compliance efforts.”
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.