I guess this is why we can't have nice things on the internet (in this context, nice things from Cloudflare). Did you know you could send emails for free from Cloudflare (https://blog.cloudflare.com/sending-email-from-workers-with-...)? Well, now you couldn't. The sunsetting probably was not Clouldflare's fault, but it's more or less similar: nice service, abused.