We recommend launching your contest as soon as you’re ready. Our creative community is extremely active on the site and would be able to start providing results almost immediately once you’ve launched your contest.
There are no times of day, days of the week, that seem to perform better than others; this is due to the fact that our Creatives are located globally and live in different time zones.
We do highly recommend to check into your contest and provide feedback for the Creatives participating. We have written a very useful article to help outline our Best Practices in order to achieve a successful contest and optimum results: