what do you mean make profit from vote ?
if you pay for votes i wouldn't agree with this and think that most in the community would frown upon this type of witness campaign
might be better use of funds to support some start up initiatives or other other groups and build support this way
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