The Real Playbook for Anchor Text, Cold Outreach, and Achieving 8%–15% Response Rates
https://www.social-bookmarkings.win/how-to-evaluate-link-building-agencies-without-getting-fooled-by-over-optimized-anchor-text
5 Critical Questions About Link Outreach, Anchor Text, and Response Rates Everyone Asks If you run any kind of SEO or content marketing, these five questions come up at least once a week