Other than seed based data would return path collect data using other means?

Seed based data is just one of the measurements Validity uses to measure deliverability, inbox placement, and overall campaign performance. The email campaign insight Validity provides is based on the largest email data partnership network in the industry: Proprietary network of 4B data points a day from aggregated statistic (volume) and message-level feeds. 3T data points/year (that's 10B/day), through hundreds of proprietary data feeds and customer data. 50 million hits per day from our publicly available global commercial trap network. Thousands of seeds from 140 ISPs, webmail/hosting/filtering providers, with specific regional provider coverage in 38 countries.