It's more like waging a war against its developers, which is one of the reasons why users adopt Android. That being said, I think that Google did the right thi

It's more like waging a war against its developers, which is one of the reasons why users adopt Android. That being said, I think that Google did the right thing in this case. I know of and use K9, so I trust it. Google does not have this privilege. While they probably have more than enough data to determine if the app is trustworthy in the first place, it would be difficult to determine if a trustworthy app went rogue in a timely manner. As for the issue, keyword stuffing is way to manipulate search results. In this case, keyword stuffing appears to have been used appropriately. Now imagine that people started stuffing in terms like Gmail or Outlook to benefit from brand recognition. Given the scales that Google operate at, it is unlikely that they could detect such transgressions effectively for all cases. The immediate removal is problematic, but it is difficult for outsiders to understand how giving notice would impact Google. Some developers may simply put such warnings on the back burner, or even forget about it, if given advance notice. Others may manipulate the system by taking advantage of the advance warning (e.g. using it to stretch out their transgression).