This is actually a good idea for this -- the user wants the education, they can pay for it with their own hardware. Keep your costs low!

Probably a better experience for everyone. You just have to distribute the image (rather than running vms) and the user gets instantaneous responses.

If it is hosted on AWS the bandwidth of distributing the images is likely more than the cost of the compute.

Cloudflare exists

I thought Cloudflare only ensures high usage of the free tier for "web"-ish responses, which doesn't even include .txt files. But I suppose this use case is several orders of magnitude away from that of EasyList, at least in request rate.

I mean you could just pay and use R2 directly. I think it would still be much cheaper.