Great idea and glad to hear that this concept is in working. Badges are an awesome concept in any social networking or platform since they encourage more community interactions. As a developer sometimes in platforms that i work or develop we use badges part of Gamification related features.
ESTM Boosting refund to 
Due to one of these reasons:
1. Not posted from eSteem apps.
2. Already curated by eSteem team.
3. Need bit more improvement on quality of post.
4. Might be too old post.
5. User already received vote in last couple hours, you can try boosting again afterwhile.
Android, iOS, Windows, Mac, Linux
Learn more: https://esteem.app
Join our discord: https://discord.me/esteem
RE: Introduction to BADGES on SteemPeak.com