MG Siegler, on Instagram switching their location service from Foursquare to Facebook:

“Facebook now owns Instagram, so of course they’re going to want to use their own place database, right? I guess. The issue I’m having is that for the first couple years after the deal, the database remained in the hands of Foursquare’s trusty API. Now, for whatever reason, that has changed (at least for some users). And we’re all worse off as a result.

That’s the real problem here. I get that Facebook owns Instagram and so they want to bring the geo functionality in-house as well. But the product is worse because of this change. Facebook’s place database is a nightmare of mislabeled and mislocated geo-barf. The data makes Apple Maps look like a pristine globe of information (more on that in a second).

Of course, Instagram/Facebook are hardly the first team to do such a thing. In fact, similar situations seem to happen quite often. The removal of Google Maps from the iPhone is perhaps the most well-known recent example.”

See also the fuss kicked up about Comixology/Amazon and in-app purchase.