To elaborate... how should Deno market their stuff?

IMO developer productivity/experience.

Deno are in an extremely privileged position that AFAIK no one has. They have control of the runtime, the cloud platform, and the framework with Fresh.

Compare Deno with say Vercel which really only have control over Next. They depend on AWS, Node, and React over which they have no control. No wonder they're investing on Svelte/SvelteKit and other projects.

Or Cloudflare who are developing their cloud infra with mediocre DX (although improving) and no framework of their own to be able to sell the complete experience.