Total number of Gemini device per account

I would like to confirm that DirecTV Stream still allows a total of 20 physical Gemini devices in one account/household?

On a previous post from Juan (DirecTV Community Specialist), he indicated the you can order up to 6 devices at a time (per order), up to a total of 20 devices.

Today I just spoke on the phone to DirecTV tech support who said, you can only have 6 Gemini devices per account.
I'm hoping this tech support agent was misinformed.

Thank you,
Tim