Loopt was effectively dead in the water when it got bought. It was a geo location app. But it got bought by Green Dot. A frequently despised (look at their reviews) finance/prepaid card company. Loopt and Green Dot happen to share connections like Sequoia. Once Loopt is acquired, nothing is done with it. Or its tech. I highly doubt they would want to spend $40M+ to acquihire however many people came over, and not even the founder. Unless Sam did?
I hate turning this into a rant, but YC's treatment of Maciej [Cegłowski]/Pinboard and the way they took back their word..eh I could say harsher things, but I'll regret it. But their handling of the community supposedly choosing a few people for F3 last year was not cool. YC seemed just like the rest of SV. https://news.ycombinator.com/item?id=11633270 is an example of the incident.
That makes me think even more firmly that the Loopt deal was done by connected people exchanging hand shakes and favors.