yes, prizes as you already know everyone gets prizes here take a look what they actually are.

Participants:
i. a follow from this account.
ii. five votes on your book.
iii. your book added to my reading list.

1st Place Winners
i. a follow from this account.
ii. a sticker.
iii. a shoutout of my message board.
iv. all of your books added to my reading list.

2nd Place Winners
i. a follow from this account
ii. a sticker
iii. a shoutout on my message board
iv. any three (if less then all) books added to my reading list.

3rd Place Winners
i. a follow from this account
ii. a sticker
iii. a shoutout on my message board
iv. any two (if less then all) books added to my reading list.

Judges

i. a follow from me.
ii. reads and votes on all chapter of your any one books.
iii. all your books added to my reading list.
iv. graphics by me if you need.

EDIT 21. 07. 2019: The votes thing has been removed since it's against the guidelines of wattpad that we weren't aware of. 

EXAMPLES OF SOME OF THE STICKERS (PLEASE NOTE THESE ARE NOT ALL JUST A FEW)