Nice contrast, i'm sure there's many applications not using logs when they should be. Perhaps a brief explanation of gas in ethereum for the the uninitiated an

Nice contrast, i'm sure there's many applications not using logs when they should be. Perhaps a brief explanation of gas in ethereum for the the uninitiated and rough USD cost at todays median gas settings from https://ethgasstation.info https://ethgasstation.info or similar. If cryptokitties 2.0 comes along you may be waiting a long time to store this data without seriously increasing costs. Depending on the use case that might be a hard choice to live with.