Thinking about new rewards. (Patreon)

We all know that raffles aren't allowed on Patreon at all, but yesterday someone from the staff sent us this article which gave me some ideas :3
https://blog.patreon.com/patreons-stance-on-raffles-lotteries-and-giveaways/

For the +$5 tier I could do a monthly contest where you post a link of your oc following the theme of the month.
By example: June theme's is ''The cutest character'' , so you post a link of the cutest oc you have, I will be choosing some, put them under votation and the winner will be drawn :3.