Inquiry regarding price, functions of RStudio Desktop Pro

Hi, I would like to ask about pricing and functions of RStudio Desktop Pro.

Let me check to be certain, that there is little or few difference in the product features and functions of RStudio between “Basic” and “Pro”,
and the main difference lies in the “priority support (8 hour response during business hours)”?

Pricing is $1,097 per year, how many licenses does this include?

Or is this priced per account, meaning it costs e.g.) 5 users = 5 x $1,097(per year)?