Seems this was changed a while ago… I only had an account (and registered IDs) on the old site. Had to reregister (why?)
Anyway… this "new" plugin ID request page seems to be rather confusing. It tells me to utilize a "domain space" ("The suggested MAXON API domain space, based on your profile, is: use.yourdomain.tokai."*). OK, so I enter my label as "org.binaryriot.foo.bar" (because org.binaryriot.* would be my domain space) and I'll end up with "orgbinaryriotfoobar". Why?
Is that just a visual problem with the site (skipping dots) or did I actually just registered something I would need to use like "org.binaryriot.orgbinaryriotfoobar" now?
Couldn't it just bring an error when I enter unwanted dots into the input field rather than wildly filtering them out?
I'm usually not easily confused, but this is rather confusing. 
(Note: I have no idea about that new MAXON API; I'm doing stuff with an old version of C4D and only need the numeric ID actually, so I guess I can live with a wrong label that can't be fixed in this case.)