There are no "official" statements on the matter.
Via back channels, I've heard this was "planned" and "these guys are kind of retiring". Is that the truth? Don't know.
For me, it feels like a departure from previous statements of "we took equity in the new partnership" and this is a team of "been there, done that".
CFO Chuck Ence was a long-time Xing employee. He might be the "tell" here. He wasn't at the ICR conference. It would seem odd if he "retired" too.
Between the Lebon's and Carney, they hold/held nearly 4M shares. Chuck has another 400K+. For some reason, sans the S1's, we can only "see" Chuck's holdings.