Users/Streamer should be able to submit Topic Icons
Some lesser played games don't have an icon, a streamer should be able to submit an icon to Twitch after streaming the game for a certain amount of time.
By icons, do you mean the (game) box arts/covers?
If so, we have plans to improve coverage of those on Twitch via IGDB covers, but also eventually help streamers and viewers add to those on IGDB.
Please let me know how I can contribute to this effort!