Do you usually receive an answer directly on the email associated with the developer profile?
I would expect that the additional capability for the Multicast Entitlement show up on your Team's ability to create identifiers in the Developer Portal, so check this out. I suspect that you would also receive an email but I do not know this explicitly.
Regarding:
If after a week I don't receive info, can I ping you?
Please wait at least two weeks. If you have not heard anything by then, send me a ping with your direct information and I can check that your information was at least submitted. Note that I cannot actually grant your entitlement. This is a totally different process that is out of my control.
Matt Eaton
DTS Engineering, CoreOS
meaton3@apple.com