What is the benefit of subscribing to sites?
Site subscription is a very important to find out the latest developments and promotions that the company your subscribing to is releasing!
It is however important to choose the right ones, you want to take note of their policies when it comes to releasing your email, do they sell your address? lots do!, then be prepared for your inbox to be filled with junk!
So I would say you can safely subscribe to sites if you know they are trustworthy or usefull to you
My policy is to NEVER sell your info or release it to anyone.