CONCLUSION
Over the course of 60 days we sent 2500 visitors to 5 different variations of the same opt-in form. We sent 500 visitors to each of the 5 phases to give us a good enough sampling to provide statistics that could be relied upon as more than mere chance.
Based on the results of the study it is conclusive that, devoid of any other influence, Social Signals do increase conversion rates. Beginning at Phase 1 with no social signals the conversion rate started at 1.2%, by the end of Phase 5 with 400+ social signals the conversion rate settled at 7.2%.
We can reasonably conclude that, in this study, Social Signals increased the opt-in conversion rate by 6%