I happen to work for that company and the reason we can call you is because we are not soliciting anything, we are not trying to sell you any product or service. Our surveys are for your benefit. http://www.nwrg.com/
I answered a call from this company. Turned out it was a legitimate survey call. The rep I spoke to was very professional and sensitive to my time.
Like many that have posted here, I usually don't answer the phone if I don't know who the caller is. And sometime I do. I think these folks are OK. They can legally call you until 9:00 pm unless yo specifically ask to be removed from their list. You can also receive calls from charities and politicians which is funny because both are actually trying to sell you something while a survey company isn't!
We keep getting calls from this company several times a day, every day including weekends for the past several months. Finally called the CEO's home number at (208)384-5724 and told her to personally take me off the list. Perhaps if enough people retaliate it will make it too much of an inconvenience for this business to exist with its current practices.