its 93$ now?!
imo it's bullshit.
basically you get invited to some seminars, fundraisers, 'meet n greet, movie nights, "networking events" (basically one of the above)
if you know for a fact you will make us of these events then consider joining, ( but don't expect to be handed some dream job on a plate, there's 9999999 students just like you who will also be members of this golden key that are also trying to get it)
otherwise dont bother
p.s. the letter they sent you is to make you feel special and encourage you to join immediatly
fact is any random can join (without getting the letter), you just need to be a few years into your uni degree, have half-decent marks and the money for the membership