Dunnhumby's Consumer Purchases Dataset for Academic Research
us.dunnhumby.com
us.dunnhumby.com
What is interesting about Sociomantic is that it has been a D shop straight from the start, meaning from the time it was a self funded startup. Another interesting bit, as far as I know, it has since been funded entirely by its own revenue, never had to depend on venture capital. Pretty interesting.
BTW I am not affiliated with any of them, although an opportunity to hack on a D based machine learning platform would be hard to resist. Too bad that they are Berlin only.
I got curious and searched if they were ever mentioned on HN. Among others this is what I found https://news.ycombinator.com/item?id=8240599 no discussion there though. It seems it has never had any traction on HN inspite of a few sporadic submissions.