Witnesses are generally voted for because they are trusted members of the community, positively contribute to Steem and Steemit in many ways, are qualified and experienced in administration of servers, and are experienced in cryptocurrency networks and software. Witnesses are expected to keep a block-producing Steem node running 24/7/365.25. They are also expected to provide an ongoing price feed of the value of STEEM tokens in U.S. dollars, set the mininum Steem Power deposit to create an account, set the APR% for the Steem Dollar interest rate, and in the future might set additional network variables. Witnesses are also strongly encouraged to run a seed-node to provide the blockchain to syncing clients.

Witnesses are rewarded for these qualities, services, and of course running their node by getting powered up by 1 STEEM for each block they produce. By being paid in Steem Power, witnesses are further incentivized to be committed long-term and also to contribute to Steemit curation.

So pls support them,hear is my support