For years every issue of
Cryonics magazine had a box showing how many subscribers and Alcor members lived in each nation. Someone in Sri Lanka, where Clarke lived, subscribed for a long time; but the last time I looked at this box, I noticed that the Sri Lankan subscriber no longer appeared.
Clarke seems a bit over-rated as a "futurist" any way, along with other 21st Century anticipators like Timothy Leary, Robert Anton Wilson, F.M. Esfandiary and the reportedly ailing Jerry Pournelle. Clarke predicted that manned space exploration would become the defining activity of our civilization by now, when in fact nobody has travelled beyond low Earth orbit since 1973, before many of today's cryonicists were even born!
For example, look at this table of predictions from a 1970's edition of Clarke's
Profiles of the Future:
