I basically have something similar to your use-case. While I'm on the free tier for all my domains, the supplemental agreement, at least in the US version, remo

I basically have something similar to your use-case. While I'm on the free tier for all my domains, the supplemental agreement, at least in the US version, removes the specific limitation to serve primarily html/text content if you enable Cloudflare Workers, which also has a free tier, applies on an account and not domain level, and has no requirement for you to serve your content through their KV system. I ended up paying for my CF Workers subscription for a different project on my account but the system worked fine prior to that. I served 111GB of a combination of m4a and png files in data from my B2 bucket via CF in the past month.