Hmmm...*secret* plan? ;-)
My only surprise is that anyone ever trusts Microsoft in the first place. The rewards are high, I suppose, but there are just so many companies who have been stepped on in the same way.
As for the lawsuit, don't expect Microsoft to be quaking in their boots about it. Even if Sendo get $300m, it'll be nothing that Microsoft can't make with the technology they've stolen. It's a tried and tested tactic, one of the advantages of being in a monopolistic position. The US government should have decisively acted against them years ago. But they won't ever, and we'll all have to suffer.