They've been raided by the FBI for insurance fraud, they reportedly conducted "tests" using samples that hadn't been stored properly, their CEOs/founders have resigned, they've let half their staff go recently and currently are not capable of actually doing testing ...
That's not saying that they never produced useful data, but ...
Why would you call them a fraud. I've done a number of tests over a period after antiobiotics and I definately saw the change into diversity correlate with the foods I introduced.