Triggering a cease and desist by a major corporation seems like a good marketing strategy, as I keep hearing about this Docusign alternative from earned media over their behaviour.
Well, happy Streisand effect to you, DocuSign!
Did they contact the developer or their website host or registrar?
Did they really have much of a moat to begin with?
"Examples of such false and misleading statements are set forth in Exhibit 1"
Is that attachment/exhibit linked anywhere?