Expired DMARC reporting endpoint exposed a NYSE Fortune 1000's infrastructure for $10

I registered an expired DMARC reporting domain (gca-emailauth[.]org) for $10. It had been published as the aggregate-reporting address in Global Cyber Alliance DMARC training docs going back to a 2019 bootcamp, and at some point it lapsed. Shortly after registration, aggregate DMARC reports for 86 domains across 20+ organizations started arriving. 56 belonged to The Toro Company (NYSE-listed), including myturf[.]com, their distributor platform, which sits at p=none. The rest - University of Wisconsin–Stevens Point (14 subdomains), the North Carolina School of Science and Mathematics, Ennis ISD