[finid]

The real spammy content is the announcement of a GA distribution that you can't download. Even with a registered account, I still can't find a working download link for RHEL Atomic beta.

[Nux]

It's probably just for customers. You can use the Fedora or CentOS based Atomic though:

http://www.projectatomic.io/download/

e.g. http://buildlogs.centos.org/rolling/7/isos/x86_64/CentOS-7-x... (optimised for cloud, no passwd login etc)