Well, I didn't fully agree with Jerry's double in 181 theory since HF19. If I remember correctly, he argues that high SP accounts have more incentive to do so now (since HF19) because there is big profits to be made.
In my eyes HF19 just reduced this opportunity for the high SP account by giving it fairly to everyone!
Thanks for the post!
HF19 did reduce the advantage large holders of SP had, because prior to the fork that SP weighted votes exponentially, and the fork reduced that weighting to a linear model: one SP, one vote.
However, at the same time the fork reduced the labor required to fully drain VP by 400%, making it far easier to extract maximum financial gain from the rewards pool. @aggroed estimated that HF19 improved the situation by reducing the concentration of rewards in the author rewards pool to 93% of author rewards going to a handful of accounts (high SP holders) from 99%.
It may, however, not be quite so improved as that, due to the reduction in labor (and therefore time) necessary to fully drain VP.
Edit: I wanted to add that this also reduces the number of votes minnows cast by 400% as well, dramatically reducing the rewards minnows deliver via curation. This also dramatically concentrates the rewards pool in the accounts of high SP holders.