Also, they may be doing a lot of people a favour. I just registered a domain name, and my vps provider, which is a small outfit, said, "Well, we don't normally provide DNS resolution for the unmanaged VPS accounts -- but I'll do it for you today." Evidently they have determined that is a hassle for them, so as google says this will "Help reduce the load on ISPs' DNS servers."
It's an efficiency thing.
* like, some people are just baffled you don't want a daily paper delivered to your door for free, for a limited time! no obligation! These people have not lived on the west coast of Canada and seen the moonscapes there that are the real expense of free daily trash delivery...I'm happy newspapers are going down, ALL of them. The sooner the better.