Our rate limit was recently reduced significantly for Twitter API calls. As a result, many artists will not have any twitter data for the past week. We are working with Twitter now to resolve the issue, and will update when we have more information.

UPDATE: We've been able to backfill the missing days for many of the twitter profiles in our system, but not 100% of them.

UPDATE: Our rate limits are back up, but there are still a few profiles with missing days.