RSBM
I know it's easy to be discouraged about the lack of movement. I think many of us are. However; DC indicated in the April PC that we should be patient with LE. It sounded (to me), that there was some information early in the case that LE is going back to due to intelligence and new information that has come to light. Pure speculation on my part, but it could be an alibi that has come forward, items collected from search warrant(s), DNA testing, new witnesses, or possible photos/videos taken in the area that day- perhaps by someone who doesn't live locally.
As to the podcasts, involvement with John Walsh, or rumors of Paul Holes assisting with the case (on Kelsi's Twitter account):
If the person(s) having information about potential suspect(s) isn't coming forward due to distrust of local LE, or out of fear of BG(s) harming them, giving an anonymous tip to a national crime stoppers line may make them feel more comfortable in sharing what they know? There have been many statements given by LE that "someone knows who BG is- someone knows who did this". I am very hopeful that this person will come forward with all of the national attention, and options for giving that one tip that will complete the puzzle.
Hang in there- BG's time is coming. His freedom is going to end. ((Hugs))