I'd guess a significant portion are low(er)-wage technical support folks. When the partners at Hamlin-Hamlin-McGill can't remember their Docusign password they need someone to call.
Docusign has terrible outsourced tech support and dreadful account management. I'm wondering what all these people are actually doing. There are decent alternatives for the majority of uses, and they cost so much less.
They probably hire two to three leet coders to get the job of one experienced developer done. And one pdf certified scrum master for each team along with two managers and product owners.