No they won't for most people.
From the payment portal:
Generally with Rocket, a VPN is overkill, as the ISP still can see that you are using a streaming service, and could if they want, block you from the end service. If you were one of a few customers doing this, it's pretty easy for them to cut you off. However so many people stream now, they can't keep up with everyone. It's usually when you are geo-blocked by the ISP or end server, it would make sense to use a VPN or Proxy, but Rocket wants to know who is connecting to them is a valid customer... that's why they have that policy.