Not having deep agents embedded in the party is almost impossible, I think. Especially, since the Libertarian Party is always the backup party in case one of the two mainstream candidates fails on the way. And then an accident might happen. There is way too much money involved as that the establishment/deep state possibly wouldn't get its fingers in.
That's also why I think Gary Johnson became Libertarian candidate. He was so incredibly weak that people couldn't possibly vote for him. I bet a lot of voters were driven into the Trump corner by Johnsons pot head appearance+gaffs.
In terms of the Paul family and their associates, I guess she is telling the truth, but usually the situation is much more complex. Usually, when in a business, you just make too many deals. It's not that the game starts at the beginning after every election and every vote for a bill. And then comes in the money. I think if you are in for too long, you end up thinking it makes total sense to endorse someone like Romney (because, the devil you know..).
Political actors like Penny are rare. They mostly give up - or if they know too much and spill the beans, they might get killed. I really hope that won't happen to her.