If cost is a factor, one could plausibly put bunny behind cloudflare’s free side.

Another positive side effect would be to have paid dual redundancy then too.

Backblaze is another neighbour that plays nice with bunny.

Their bandwidth is still too expensive and that is what really matters for an edge worker. It is not AWS expensive, but still 0.01$/GB is not cheap.

I don't think egress really matters for this use case. How many API calls or HTML pages do you need to transfer 1GB?

You usually use them for compute and low-bandwidth related activities (like an API).

They're close to as cheap as they come for CDN bandwidth list prices without minimums, especially for CDNs with their level of global coverage. Competitors in this space in particular are often much more expensive, like Deno Deploy's $0.50/GB.

Cloudflare is effectively impossible to compare because it's all "free until you get an email from sales".