The "hint" they refer to in the post is that the first letter of every paragraph spells, "SSL TLS FREE".

Alt title: "CloudFlare offers to MITM all customers for free!"

Source: https://news.ycombinator.com/item?id=8337815

Not to knock on CloudFlare too much though. Their DDoS & malware protection is definitely a nice plus to have. Just know what you're signing up for.

Some what ironic that I get "SSL Connection Error" in Chrome for that post!