You vote for me as witness.
I make blocks and get SP.
Part of that is payed out to all my voters.
Not everybody can afford to run a witness node.
Do you frown upon cloud mining?
And you are free to give your 29 rest votes to other witnesses, who don't give that much back to the individual.
And bid bots where also frowned upon in the beginning
https://steemit.com/witness-update/@isnochys/witness-vote-staking