Since 'dust' is a descriptive term, not a technical term, I think that he's well within reason to call the tiny wallet transactions 'dust' and talk about ways to make them productive.
But if you insist on being pedantic...
dust is a new term operated by steemit cooperation
Steemit Corporation only runs steemit, inc, not Steem (although they still take lead on Steem development). Dust as your are defining is a blockchain term, not a Condenser term.
if for any reason , your post, or comment has a reward less than 0.024 steem, then it will be after 7 days for the posting date ZERO REWARD.
The cutoff is actually 0.02 STU, not 0.024 STEEM.
dust is a term acknowledged by steemit cooperation , and as they made the program and software, they implemented this in the blockchain as a cutoff of the rewards, who else can do it, of course not you and not me and not any other user of steemit platform.
however, you should keep bearing in mind that the value of dust is a measure by experiment from the users like you and me as there is not a fixed value assigned by steemit officially, so, from the steem world calculations it is nearly any value less than 0.024 steem and regardless it is 0.02 stu or 0.015 sbd or bla bla bla bla .. it is a value deducted to reach zero reward if your post has a reward less than 0.024 steem .
it does not matter if the unit stu or steem or euro or sbd or any other unit, by this action, many small writters lost a passive daily income and only the rich people is getting the best of the steemit.
because of that, some great people tried to overcome this shit dust by adding a value to the dust reward to reach a limit 0.025 steem and they have added some bots here and there but again the whales of steemit fucked them as you can not see these bots any more unless you know the link since day one - for me i stopped using these dust bots since very long time as i do not care anymore about the dust.
thank you