Well as long as vote buying is not the only means of appearing on the trending page, that is a start. Stopping people from buying votes is impossible except the platform itself is restructured in a way where bidbots and other forms of vote buying will not be necessary. Until then, getting it clear that it is not visibility but profit that brings people to vote buying is a start.
For, whoever does the maths will realise that it is those who have money that trend not those who have the community at heart. This also means that the constant harping on community and interaction and engagement.... Is bullshit. The platform only cares about those making money not those making quality content.