I think they just don't want you to serve large stuff, because their CDN isn't optimized for that.

I serve all kinds of files <10mb via CF, that includes audio, video, images etc.

Files over >10mb I handle myself. Around 100TB is handled by CF each month and around 700TB by my own servers (4 Hetzner dedicated servers).

The whole setup costs me around 300 euros/month paid to Hetzner, and 20 to CF. That means I pay around 40 cents / TB.

So far CF hasn't complained, and I've been using them for years. Though they try to pitch me their higher priced plans now and then.

I've never used Cloudflare, so I got to ask, do they prohibit serving large files or discourage by some quota?

They suspend accounts (after months if not immediately) that abuse serving disproportionate amount of non-HTML content, videos specifically. However there is still ambiguity (or lack of detail) in their terms if you can use their Workers, a paid FaaS, to stream blob data.

I thought this only applies to their free accounts, and that they have no issues with serving any size files as long as you pay them.

I've only heard stories of people getting terminated over abusing their CDN like that, and I don't fancy being next.

> I know they don’t want you to serve video.

They do have an optimized product for that with Cloudflare Streaming.

> I know they don’t want you to serve video.

They do cache small video files, even for free, but I think they don't want you to run a streaming business on top of them (without using their dedicated service).