We have two at the moment: First, that one or more than one of workers in Google in India for some reason had strange sort of hatred towards OSM, not caused by they working for Google, which caused them to vandalize OSM objects in certain cities located in different hemisphere. Second, that they for reasons unknown were told to do that; Or the measure of their achievements could be influenced by OSM maps being worse; the profit has to be short-term and obvious for lower-level workers to fall for it.

First seems to be highly improbable; second seems just improbable :) Right now second wins. Any other mental models?