I'm the founder of Heat Ledger Ltd. https://bitcointalk.org/index.php?topic=1543991

http://heatledger.net is the official forum for HEAT.

The OP of this thread offered to promote the contest for more visibility and is apparently doing good job at it.

Logo contest bounty and other possible payments are paid directly to the winners by Heat Ledger Ltd, a registered Finnish company that collected about 1600 BTC worth of cryptocurrency in its ICO ending in August.

Thanks for your interest in contributing to a perfect symbol for the HEAT token!