We have deployed a micro-batching feature which allows Requesters to break up their studies into smaller segments, and to include time intervals between the segments. We developed this feature to increase sample representativeness. This feature can also save 50% from the upcoming MTurk price increase.
Here is why this feature is important for data quality. If a Requester launches a study on Monday afternoon, there will be a bias in the sample toward people who are not working on a weekday (unemployed, stay at home parents etc.)