CCC is the ticker for Creative Coin Crypto on Steem-Engine.com. It's a SCOT token that "powers" the creative community. Visual artists, including photographers, among other creative content producers are welcome to post content using their own front end or the #creativecoin tag. There are people here who seem to value that community and its coin. Hence the good rewards.

By the way, SteemPeak allows ten tags these days.