Zscaler experts notice that free hosting and DNS providers abused for hosting Phishing Pages, Spamming, Botnets or Malwares. Many free hosted sites considered as spam. Free hosting can also be blacklisted by Google or Browsers soon. Due to the reason of free, there is no uptime guarantee. The reliability of the web service really cannot be promised. Spammy websites can only get to use free hosting services, as good hosts won’t take up spammers.
Source: https://thehackernews.com/2012/03/role-of-free-hosting-in-cyber-crime.html