Hello!
Reddit Place + Ethereum smart contract = UNICEF Charity project (https://bitcointalk.org/index.php?topic=5238471.0)
Description:
The project involve an canvas 1024x1024 pixel, which metamask users could edit by changing the color of a single pixel for a donation to the United Nations Children's Fund.
The minimum donation amount = 0.000100000000000001 eth
After placed, a timer prevent the user from placing any pixels for a period of time varying ~5 minutes (23 blocks).
PLACE website
Smart contract
Internal Txns
Video Reddit Place
Wiki Reddit Place
UNICEF launches Cryptocurrency Fund
UNICEF ethereum address