First, in the real world private registries are used for builds containing source, sensitive keys, and so forth. There is a use case here.
But second, no enterprisey company will use a service that bills like this, because
-$4 and $250 per month all rounds down to zero, so it's not a selling point
-$4 signals no support when the shit inevitably hits the fan
-$4 signals this company will tank along with your data in a month
An enterprise company with actual money will take an hour or two of dev time to boot up one of the open source registries (https://github.com/dotcloud/docker-registry) and stay in control.
Source: working at a Docker startup for almost a year
But second, no enterprisey company will use a service that bills like this, because
-$4 and $250 per month all rounds down to zero, so it's not a selling point
-$4 signals no support when the shit inevitably hits the fan
-$4 signals this company will tank along with your data in a month
An enterprise company with actual money will take an hour or two of dev time to boot up one of the open source registries (https://github.com/dotcloud/docker-registry) and stay in control.
Source: working at a Docker startup for almost a year