Top 20 witnesses are important and usually their position there is hard earned. However, they have no economic incentive to be on position 1, 7 or 15, other than their personal reputation as witnesses.

While witnesses outside Top 20 earn more witness rewards the more votes (more MVESTS) they get. Can be only a temporary strategy we use to help them during these tough times with these low Steem and SBD prices, because they still have server bills to pay.

Afterwards, we'll see who still deserves to secure our vote.