Hello,
It could be that around 200 of those 600 members have canceled their subscription and their account simply has not EOTed yet (the Paid Subscr. ID remains on their account until their account has EOTed).
When s2Member processes a cancellation, it won’t necessarily remove access and EOT their account immediately. Please see the note below from Dashboard -› s2Member® -› PayPal® Options -› Automatic EOT Behavior:
*Some Hairy Details* There might be times whenever you notice that a Member’s Subscription has been cancelled through PayPal®… but, s2Member continues allowing the User access to your site as a paid Member. Please don’t be confused by this… in 99.9% of these cases, the reason for this is legitimate. s2Member will only remove the User’s Membership privileges when an EOT ( End Of Term ) is processed, a refund occurs, a chargeback occurs, or when a cancellation occurs – which would later result in a delayed Auto-EOT by s2Member.
s2Member will not process an EOT until the User has completely used up the time they paid for. In other words, if a User signs up for a monthly Subscription on Jan 1st, and then cancels their Subscription on Jan 15th; technically, they should still be allowed to access the site for another 15 days, and then on Feb 1st, the time they paid for has completely elapsed. At that time, s2Member will remove their Membership privileges; by either demoting them to a Free Subscriber, or deleting their account from the system ( based on your configuration ). s2Member also calculates one extra day ( 24 hours ) into its equation, just to make sure access is not removed sooner than a Customer might expect.
If you’re suspicious about an account that canceled, you should enable logging (Dashboard -› s2Member® -› PayPal® Options -› Account Details -› Logging) and then search for any messages related to the Subscription ID in question. (Keep in mind that if logging wasn’t previously enabled, you’ll need to wait until another member cancels; logs for previous events won’t exist if logging wasn’t enabled.)