I think the 'out of good ideas' explanation is the one that best fits the "jump the shark" theme. But it is also used to indicate that you've peaked and started on your way down.
They've been offering a few good ideas lately to ease the burden on the rank and file. Whether this continues remains to be seen. Easing the burden may bring on a transition period where the die-hards have to face some difficult decisions, but could help the organization survive in the long run.
I think they're at a crossroads. Becoming more mainstream may allow them to keep more people from leaving, but at the cost of their unique identity (which is not a bad thing).