From Yog-Sothoth.com:
After more than a decade, the the H.P. Lovecraft Historical Society have decided to reopen membership to the public.
“When the HPLHS was first formed in the 1980s, we offered members cool certificates and membership cards. We abandoned issuing ‘official membership’ in the Society in the 1990s. But after thinking long and hard about it, we’ve decided we are once again open for membership.”
Besides a membership certificate and card, joining the HPLHS will also grant you access to extras on the HPLHS web site and more. Read on for further details.