in this day of internet info why would you join any of these "services". all the info you need is free on this board and airlinepilotpay.com.
back about 10 years ago air inc. was useful for app addresses and that type of info but now like I said its all free, just ask any your question on these boards. you may have to sift thru some crap but if you have an ounce of common sense then you'll be able to pick out the genuine advice.
now going to one of there job fairs - that may help but you don't need to be a member for that.