After reading their web site, sounds like for $50 you get monthly newsletters on self defense and advice for legal aid for self defense. The question that comes to mind is this recycled information that you have already read/previously published or information that you could easily find? All the same, for only $50 it sounds like you will get a lot of information electronically sent to you that could be good for reference use.
My advice ... first find a good instructor and get training and then find a lawyer who can give you advice regarding the laws where you live.