For any of the following Cloudflare products, are any as complex as SMS or Email? None of these are adversarial and covered by legal constraints to my knowledge (except ddos which is a resource game). I'm unfamiliar with their "china network" - probably some legalities there.

Cloudflare Services:

Advanced Certificate Manager Advanced DDoS Always Online™ Analytics Anycast Network API Apps Marketplace Audit Logs Argo Smart Routing Argo for Spectrum At Cost Registrar Bot Management Browser Insights & Origin Monitoring Browser Isolation (Advanced) Bring Your Own IPs (BYOIP) CDN Certificate Transparency Monitoring China Network Cloudflare Access Cloudflare Gateway™ Cloudflare Gateway™ (DNS Only) Cloudflare Images Cloudflare Logs Cloudflare Network Interconnect Cloudflare Pages® Cloudflare Registrar Cloudflare’s Security Operations Center (SOC) as a Service Cloudflare Spectrum Cloudflare Stream Cloudflare WAF Custom SSL Data Localization Suite Dedicated SSL DNS Firewall Enterprise DNS Only Enterprise - Primary DNS Error Pages Healthcheck Image Resizing Intel Keyless SSL Load Balancing Magic Firewall® Magic Transit® Magic WAN® Page Rules Page Shield Premium Success Rate Limiting Secondary DNS Secure Registrar SSL for SaaS SSL for SaaS Advanced Standard Success Offering Static IPs Teams for Enterprise Waiting Room Workers Bundled Workers KV Workers Unbound