Wow that was my first time looking at http://ourincrediblejourney.tumblr.com/ . Is their some template you fill out for your blog whenever you get acquired?? Seriously: copy, past, repeat.
I would definitely take that bet. Startup founders for the most part, even ones accepting 9-figure acquisitions, don't tend to have people ghost-writing their blog posts. (Dedicated writers on their team maybe, but not authoring blog posts with the founders' by-line.) I agree with your parent though.
Incredible journeys are when a purchase is immediately couple with a shutdown of the app. We've seen no sign that's happening at this point, and with the size of its install base (half billion users in one form or another), it'd be a crazy mistake for Microsoft to make.
Microsoft has already launched dozens of apps on Android and iOS, and there are several it has already bought in. That's part of its cross-platform strategy.
There's no guarantee that Microsoft won't rename an app, or incorporate the technology into an existing app, but it has no reason to pay $250m for something just to shut it down...
In this case, the acquisition was by Microsoft's Technology and Research division, not a product or service group. It seems like the goal is to integrate SwiftKey technology into many of Microsoft's mobile applications.