Vadge - Like any other deserving organization, the NRA will send you a zillion letters, surveys, warnings of new legislative tactics, etc.
The underlying principle is that they are reminding you that it requires more than just your membership fee for them to be truly effective.
So decide what extra you'd like to give, when you'd like to give, and ignore the constant requests.
Some people would like to point out that the NRA hasn't been able to make much headway in NJ and spin it to a "Why should I give money to the NRA?" question.
The reality is that we need to support both National and Local organizations to be truly effective.
Hence, give to the NRA on the one hand AND give to the NJCSD.org on the local level.
We all wish we lived in a world where we didn't have to constantly struggle to defend our 2nd Ammendments rights, but that's not going to change anytime soon.