I'm looking at the spreadsheet, and you're due to receive 24 million Furious Energy and 46 million Big-Brain Energy, so 70 million total Energy. The amount to double is 2 $HIVE for every 1 million Energy of all types, that's why it's 140 $HIVE. And it's 4 $BEE per million Energy, so it's 280 $BEE to triple for your @dynamicgreentk account. We decided to make the amounts based on the amount of the airdrop because we thought this would be most fair for everyone, otherwise whales would get a much better deal when doubling than others.
We don't want anyone to feel obligated to donate, so no worries if you don't want to.
To start off, the use case is tipping other players - we have some ideas for additional future utility, but unfortunately I can't promise anything more specific.