It incentivizes voting with is inorganic.
I think that if people are active, it might actually encourage organic voting more. This could be tweaked in several ways by for example changing the way it distributes, rather than just following the reverse auction and stacking effects.
It can also encourage other organic activity such as engagement, etc. Nothing is simple. All of it has to be judged case by case and unless it is overwhelmlingf negative and cannot be controlled (bid bots before free downvotes), I tend to think it's good.
I'm trying to think of the bad, not my actual opinion.