It's strange that they didn't try to negotiate lower pricing or just use another storage service. Or, just have the lambda delete the file or change its storag

It's strange that they didn't try to negotiate lower pricing or just use another storage service. Or, just have the lambda delete the file or change its storage tier once processing is done. Or, just use a lambda instead of a proxy. Or, just use cloudflare. Many times "why not" is more interesting than "why."