I would rate the scalability an eight out of ten. In my organization, there are a lot of customers who use this solution on their network. We use it extensively in our organization. Moreover, we plan on increasing further usage. 

It's a scalable solution. It integrates well with Playbooks.

The solution is a cloud service hence pretty scalable. I would rate its scalability a ten out of ten. 

Scalability has not been an issue for us. I have two customers using this solution and there are perhaps ten people using it. These are enterprise-level businesses.

We have around six users who access Palo Alto Networks AutoFocus.