Isn't GateGuru a TripAdvisor company?
Maybe they're trying to drive all discussion about airside amenities to that (and help resuscitate it--it's been dying for awhile). If so, they're doing a crappy job of it--they'd have done much better to move that content over rather than delete it or at least mention that in their notices of deletion.
Or maybe they truly don't care as a company to aim for the air traveler market. That would explain why they're letting GateGuru die a long, slow death...