I don't think you need to change anything. Not everyone wants to hitch their wagon to Google or MS. I'm one of them. I don't use any Google services aside from their search engine. I stopped using most all of Amazon's products and services too.

Why? Because there are always strings attached to that. For example, I don't want Google controlling or having access to my email.

Google's "App Store" is another good example. I read stories of developers getting booted off there almost weekly. Google provide almost no feedback as to why, and gives them no way to settle an issue.

I would highlight these kinds of issues in my marketing and promote personalized customer services.