用过 afraid.org 免费二级域名的可能会发现，获得的二级域名并不会被 Google 收录，就算你再开个三级的解析，也不能收录。 
为什么呢？
在 freedns.afraid.org 的 FAQ FreeDNS FAQ 里有说明： 

Subdomains created off of shared domains have some permissions restrictions. There are no permissions restrictions with Google that apply to domain owners themselves for hostnames they create to their own domains. 
Users of shared domains may use freedns.afraid.org with Google ...