That Laxo Trade spammer is sending 1000 satoshis all the time, all over the place, and none of their tx failed. Some fountains send even lesser amounts.
I don't think that threshold thing happened here - more likely not all shares are connected to the right addresses yet. That's why this div was - to clear out the shareholding status. So, check your address, and if the div is not there, clear that out with FC.
Laxo is sending 10000 Satoshis as far as I know. What you remember is maybe from before the introduction of the dust threshold in 0.8.2? Faucets and fountains were mostly killed by this, see for example
http://bitcoin.lift-institute.com/killing-the-dust/many outputs like this, put in a single tx - same way AM sends out divs.