Paid social can help amplify organic content, using social network advertising tools to target the audience. Using the rugby example, on Facebook you could target people who like other leading rugby fan pages. I recommend testing paid social campaigns to promote key content assets like reports and highlight important news/announcements. With a small budget you can quickly measure amplification impact.
If we are managing any SEO project for a long time, then it is our responsibility that we should analyze our track record and modify required changes in every 6-7 months according to organic traffics, keyword search volume, ranking position, landing page metrics, INSTEAD of comparison these points after loosing our ranking position and organic traffic.