Well the trick is that each resteem counts as one not like votes with varying weights with whales having a larger say because of their steem power. Even if they sell resteems, the resteem would still be counted as one same as others. How they can have a larger say is through their larger follower count which can make a post viral once a whale resteems it, but it would still be less impactful than the current weighted voting system to get into trending page.

The whales will still have larger say in allocating rewards, that does not change.