Some answers to questions in the thread:
Q) didn’t Akamai buy Edgio?
A) no, they just purchased customer contacts (spoiler: sales calls are coming). Link: https://www.akamai.com/newsroom/press-release/akamai-announces-winning-bid-for-select-assets-of-edgio
Q) How do you know Digicert use Edgio?
A) nslookup something like Digicerts CRLs.