Cloudflare will charge per request over a certain threshold, like S3 does for API calls, so it won’t be just 13 cents depending on the rate of requests coming in.
“R2 will zero-rate infrequent storage operations under a threshold — currently planned to be in the single digit requests per second range. Above this range, R2 will charge significantly less per-operation than the major providers. Our object storage will be extremely inexpensive for infrequent access and yet capable of and cheaper than major incumbent providers at scale.”
“R2 will zero-rate infrequent storage operations under a threshold — currently planned to be in the single digit requests per second range. Above this range, R2 will charge significantly less per-operation than the major providers. Our object storage will be extremely inexpensive for infrequent access and yet capable of and cheaper than major incumbent providers at scale.”
Source: https://blog.cloudflare.com/introducing-r2-object-storage/