Last year, I won 2 ea $25 Starbucks-one each in 2 consecutive months.
This year, won a $10 Lowes, then a $10 Gas Card (Mastercard) and then a $15 Barnes and Noble.
Feel VERY lucky.
This seems totally random to me. I try to play later in the month, after the free codes for video, answering questions, and browsing have been out for a couple of weeks.
HTH