RabbitHole launched a new quest today. You basically get a free ENS name by completing it. An ENS name is a human readable name that you can link your Ethereum address to so you can use that instead of your plain 0x public address. You will need about 0.05 ETH and be BrightId verified in order to complete the quest, but when the campaign concludes, you will receive 0.05 ETH as a reward. You can actually complete the quest for less that 0.05 ETH if you choose to register your ENS name for only 1 year (you can renew after that), and if you get lucky/are patient to get good gas prices. You will need to submit 3 transactions which cost gas and pay one fee, here is what I paid:
Gas used for the first Tx: 43,667 @ 110 gwei = 0.00480337 ETH
Gas used for the second Tx: 276,997 @ 105 gwei = 0.029084685 ETH + yearly registration fee: 0.006131649119053559 (I went for 2 years)
Gas used for third Tx: 123,770 @ 105 gwei = 0.01299585 ETH
Total Gas: 0.0530155541
Including the reward: -0.0030155541 ETH (about $5 right now) + That sweet RabbitHole XP and nearly a free DNS name