I agree. It is much better to run under the carriers authority. In addition, if one is only paying 62%, you are not going to do that well with broker loads. As mentioned, Panther pays 85% and that is a much better rate. They also handle all collections.
I have looked at enough NLM boards to know there are certain areas of the country that produce little freight. There are only so many days in a month and every day that you sit is a lost opportunity to make money. If one load is not great paying, add another to increase the rate. Of course you don't want to run your truck at a loss so you must gain some experience with doing this. In addition, find the brokers that work well with you. We have several and some of thoere rates were very simular to the expedite load. Put two on the truck if possible and you are running at a much higher rate. We have done this for a good period with a truck that has a 18 foot box.
The other item to consider is that I have never had a brokered load on the truck that paid less than any companies normal deadhead or empty moves.
Certainly not for everyone, but for some it is a viable option
Davekc