If the FTC cared about BFL's sockpuppet accounts (which, to be fair, only may or may not exist until proven beyond reasonable doubt), they would subpoena the relevant records. They have been granted the authority to do so by the court.

Given that no such subpoena has been issued, we can only assume that the FTC believes its case is strong enough based on Inaba's and SLok's personal posts on this forum, without going into the minutiae of their potential sockpuppets. And judging by the evidence I've read - particularly BFL's claims regarding the Monarch being in the "final stages of development" in November 2013, contrasted with their statements in the confiscated internal Skype chat log - I'm inclined to believe the same.

Since this particular element of the accusations against BFL will likely not be proven untrue any time soon, it would be better to drop it and concentrate on Josh's specific lies that have been proven lies through sworn and/or impounded evidence. That will be enough to hang them.