Everyone wants to be part of a secret society, so why not be part of one of the best ones? Why is it the best, I hear you ask?
Quite simply because unlike those *other* groups, this one has actual tangible benefits. Access to other secret members, and an actual dossier created about you, replete with stamps festooned upon your passport to commemorate your achievements within the society!
Plus, there is a non-zero chance of a dimensional shambler visiting you at some point.So yes, totally worth it.