Re: the e-mails, Comey has already said that they found no evidence that the e-mails were intentionally deleted in an effort to conceal them. He didn't say they found some evidence, but not enough to be conclusive, he said
no evidence.
Further, he also gave the following affirmative assessment:
"Our assessment is that, like many e-mail users, Secretary Clinton periodically deleted e-mails or e-mails were purged from the system when devices were changed. Because she was not using a government account—or even a commercial account like Gmail—there was no archiving at all of her e-mails, so it is not surprising that we discovered e-mails that were not on Secretary Clinton’s system in 2014, when she produced the 30,000 e-mails to the State Department."
Hence phrasing like this thread's title ("...that Clinton didn't disclose") are misleading, since they imply Clinton had them but just didn't turn them over, whereas Comey has said they were not on her server. The FBI had more resources, time, and did a more thorough technical search and was able to recover more e-mails.
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As far as the substantive issue, Clinton had rich friends who were also donors to the foundation, who got access to Clinton and who asked for favors, but never got any specific action directly for money. How is this different than a political fundraiser, where people pay a certain amount of money to attend a function, or participate in a strategy session, with the candidate? By that standard, all fundraisers are "pay to play." The e-mails show Band and Huma were sensitive to ethical concerns even in their private e-mail discussions and tried not to do anything they felt would be unethical.
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Also going to point out that independent charity watches have found that the Clinton foundation spends 89% of its money on charity, and it has saved thousands, if not millions of lives, so there's that.
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Also, the following comical exchange from Huma's deposition:
Yes, the server was definitely a conspiracy.
