you should call and ask if you're worried. I run asterisk and my take is they don't care as long as you're not abusing the service, IE trying to resell or run a business over it. If they asked me not use asterisk I'd probably move on, only because I like the flexibility it gives me to use voip as my home phone. My overall usage over voipo is very low though. This is my opinion though so if you're concerned ask support and service is pretty good!