Sorry @yoo1900, I am one of the winners on 17.05.2018 but I also have not received UPVOTE from you yet. I see all the winners on 16/5/2018 and 17/5/2018 have not received a prize from you.

Winner of 17/5/2018 who has not received Upvote :

and this is the winner of 16/5/2018

while the winners on 18/5/2018 and 19/5/2018 you have given Upvote. Please check back. thanks.