I don't see, in their FAQ, how they deal with "you can't put CNAMEs in the zone apex according to the RFC, but cloud hosting providers like Heroku want me to se

I don't see, in their FAQ, how they deal with "you can't put CNAMEs in the zone apex according to the RFC, but cloud hosting providers like Heroku want me to set a CNAME on any domain pointing to my site". If you only have a dedicated box, or if you have a full time on-pager sysops team, then, yes, it's easy enough to set A records on the zone apex pointing to your web server.