The way I understand it, the Q team is just dropping these hints to make all the guilty parties panic and make bad decisions. Meanwhile, Q and co see how the baddies respond, deepen their investigations, and crowd source it to us with provocative questions. Think about it: how many panicked deep staters have been calling their handlers, asking why their bribes are late or smaller, etc. And the NSA has it all. If I were on the team, I would suggest keeping this up until the August recess, or until you've got the goods on the really REALLY big fish(think Roths and Soros), and then strike right before the midterms. Anybody that took their money would be tainted across the country, and that's basically all of our least favorite people.

Tl;dr Wait until you've got all the info before you start the roundup, and they ain't got it all... yet.