I think this is a larger group of questions we're updating in the index than we were before. Given that we should add a statsd call here so that we can keep track of how many we're updating every cron run to get a feel for whether we need to revisit this and slim it down further.

To be honest, it'd help a lot if when we were updating num_votes_past_week we also updated a datestamp. Then we could just query the datestamp. Waaaay easier.