It's essentially the same as being a Hive witness, but for Hive-Engine. It helps 'decentralize' the second layer and keep it secure. I have been a witness since it was in testnet, so I keep it running because it pays me in BEE tokens. People with WORKERBEE staked can vote your witness, which can be a problem because not a ton of people hold those. Same 20 +1 model as the main chain. I can't tell you why you would want to be one, that's up to you. If I hadn't been on it for years at this point, I wouldn't start one up now. I don't like having to campaign for votes. That is why I like proof of work so much more.
It's essentially the same as being a Hive witness, but for Hive-Engine. It helps 'decentralize' the second layer and keep it secure. I have been a witness since it was in testnet, so I keep it running because it pays me in BEE tokens. People with WORKERBEE staked can vote your witness, which can be a problem because not a ton of people hold those. Same 20 +1 model as the main chain. I can't tell you why you would want to be one, that's up to you. If I hadn't been on it for years at this point, I wouldn't start one up now. I don't like having to campaign for votes. That is why I like proof of work so much more.