[quote name='PrinnyJ']do you give the people who took a survey their numbers at the end of the week or right after they take it?[/QUOTE]
My new policy is I send out the numbers on 7th for WEEK 1, 14th for WEEK 2, 21st for WEEK 3, and 28th for WEEK 4. Then after I send out the numbers I usually give about 48 hours for everyone to receive and contact me in case I missed them when sending out numbers. Then I announce the winning numbers. I do it that to ensure that I'm giving everyone a fair chance to redeem their number, since they only have a 5 day window to redeem it before I pick a new number.
So, say somebody did a survey the 29th. They'd wait longer for their number than somebody who did it the 6th.