> Should we celebrate acquisitions? [...] everyone congratulates everyone else

Are they? Postmark didn't mention anything about celebrating or congratulating. They did say they were "excited [...] Postmark will [...] become even better". And it took "nearly a year of soul searching and questioning" so it seems more introspective than the champagne popping party the blogger seems to have inferred. I think they're carrying more cynicism into this than is actually there.

Unless you're naive, there's strong incentive by the parent company to ensure customers are placated so things are spun as a success for that reason. Is the blogger questioning the function of Public Relations/marketing?

Because, it's a thing, ya know?