iirc, wp-cron is activated by page visits, but this is a problem if your site is low-traffic, as wp-cron will stop archiving without activity (as indicated by missing tweets and no "next archive in" counter in meta tab).
Need to see if there's a way to force cron without visits.
This is a particularly big problem for high-volume Tweeters, who may not notice cron is off until after 3,200 tweets from their last archived ones, meaning potential data loss with this disruption.
iirc, wp-cron is activated by page visits, but this is a problem if your site is low-traffic, as wp-cron will stop archiving without activity (as indicated by missing tweets and no "next archive in" counter in meta tab).
Need to see if there's a way to force cron without visits.