Thank you for this informative article. I'm still trying to gain a better understanding of this issue - at this point the distinction I draw is between bid bots that auction their vote in a way that pulls in a lot of naive minnows, and vote selling services that guarantee at least a range of ROI (after curation this usually amounts to a gain of SP). The question I always ask myself is: can it help a minnow grow? But the larger points in regards to sustainability of the platform are well taken.