Dear <NAME OF WINNER>,
It is my honor to inform you that your submission <NAME OF SUBMISSION> has been selected as a winner of <NAME OF CROWDSOURCING PROJECT>. Congratulations!
Your submission was engaging and well-crafted. Your idea to <XXX> impressed the judging panel immensely!
I am absolutely thrilled with the overwhelming response and quality of submissions. Ideas ranged from <XXX> to <XXX>. I encourage you to take your ideas forward and make them into a reality. You may also wish to contact these resources for additional support: <LIST>.
<PAYMENT DETAILS AND TIMELINES>
<IF NECESSARY, CONTACT PERSON NAME AND EMAIL>
Thank you so much for sharing your idea with us and, once again, congratulations!