If you read Grassley's letter it contains very little verifiable information. It mainly talks about the FD1023 and not specific info from any other whistleblower.You mentioned "the informant" as though there was only one. There were quite a few more. I'll be curious to see if the DOJ answers the same as you did, or if he answers at all. Guess we'll find out on Nov 17.
The "hundreds" of SARS don't mean shit. As I told you, they are generated automatically for any large or unusual deposit or transfer.
The intent of his letter is not really aimed at Biden corruption in evidence...he is now scraping the bottom of the barrel trying to say the DOJ and the FBI killed off investigations.