I've been in contact with a couple of folk from the Society in the last day or two to mention the issue of the original members not been made aware that they should or could renew membership and/or pay a monthly contribution. Both told me that members have been emailed and that information has been on Twitter and on the website.
Apparently, when mass emailing they do not send out individual emails but use a marketing programme to do it en bloc. I'm no techie expert but believe this allows them to check who has opened emails and who hasn't. Surprisingly, a few hundred emails are never opened (I don't know the exact figure). This could be down to emails ending up in spam folders or being sent to old email addresses, or being bounced back due to overflowing inboxes. So in short folks, if you are a member check your spam folders and also that the Society does have your up to date email address. Thats not to say of course that individual errors can't be made.