The former won't work. People keep making this prediction/claim/suggestion but it is really mathematically impossible. If most smaller accounts try to boost their posts they will end up blocking each other and driving the breakeven point higher. The reward pool is fixed size. Everyone can't be an "above average driver", to borrow an absurdity from the famous survey. It will always remain out of reach.

In addition, and by design, by boosting their posts higher in hopes of reaching some elusive break-even point, they make them more visible and attractive to downvotes. So, even if it could work, which it can't, it won't work in practice.

The latter is a bigger concern because it is at least mathematically possible. We will have to see how it works out, but from a starting point we should at least state clearly that it isn't socially desirable for that to happen and try to enlist agreement on that point. Yeah, I know we can't depend on that, but it can't hurt.