The problem is once you&#x27;ve tried this &quot;impure&quot; method there is no turning back. Once an ISP finds out they can offer some apps free but make other apps count towards data usage, the whole nature of the internet changes. Note that zero-rating is just one aspect of what mobile networks want to do; before the explosive activism in March, they were being more flagrant and trying to charge extra for each WhatsApp message or add extra charges for Skype calls.