Michael is between a rock and a hard place. If he names the client, then some might wonder which of the restaurants are "safe" and which are not. If he doesn't name the client, the PR has just a whiff of fluff.
But what is stopping Michael from giving some dollar figures for the deal?
Step aside son, you're blockin' the MOMO! ... .. Disproving absence of evidence should be easy, show the evidence of.