What about providing a BitTorrent link? The main server could provide a backstop seed, and presumably enough other people would seed too for any decent-sized project.
P2P downloads would help cover some of the costs, but popular projects probably need a direct download link with load balancing as well.
If the project doesn't want to manage their own infrastructure, they're probably going to want a CDN or object storage provider. The most cost-friendly I've seen is OVH's RunAbove object storage, but I'd be interested to know if there is anything else comparable.
If the project doesn't want to manage their own infrastructure, they're probably going to want a CDN or object storage provider. The most cost-friendly I've seen is OVH's RunAbove object storage, but I'd be interested to know if there is anything else comparable.