Most of the most socially active accounts that currently reward their red fish commenters with a single above dust level treshold up-vote for their comments won't be able to anymore. So redfish who currently bring value to the platform by bringing social interaction to the posts of minnows and dolphins, no longer will get "any" growth from doing so. The easy fix (decreasing dust level from 0.02 to 0.002) doesn't seem to be on the table, but the lack of this fix does have the potential to make HF21 a platform killer. It may not seem like much in terms of solar value, but it is massive in terms of social value.

As for bid bots. The bid not ecconomy is going to boom. Stake is worth substantially less for small account than the same stake is for larger accounts because of the curve. This will stimulate minnows and dolphins to delegate their stake. Bid not owners will be able to cheaply rent SP, and on the demand side, with increased curator share for bid not owners, the price for bid not usage will go down to match the compensate for lower ROI, allowing bid not users to use buy larger upvotes for the same bid. Larger bids will be needed, as users will try to beat the curve with the upvotes they buy. New accounts that currently use bid bots will be forced to, because with the new curve and the dust treshold in place, it will be the only way to even exceed dust treshold for such accounts.