This reply is in bad faith. He did not attempt to "justify" the pricing with "vendor lock-in". Indeed, the prices went down, not up.
Cloudflare's alliance with other infrastructure providers mean Cloudflare's platform isn't really limited to "API" workloads. This is discounting the fact that Cloudflare recently announced Workers Unlimited for workloads that need to run longer (upto 30mins) though then they do charge for bandwidth.