Cloudflare has stopped API support for cf/ga/gq/ml/tk domains

I use a cf domain on cloudflare for testing purposes and just got this response via the cloudflare API:

``` You cannot use this API for domains with a .cf, .ga, .gq, .ml, or .tk TLD (top-level domain). To configure the DNS settings for this domain, use the Cloudflare Dashboard. ```

Anyone know any news about this? Maybe since those TLDs are given out for free, Cloudflare is using this as a sign of spammy users?