> Is it because they also have a web version and people can use the web version also (amounting to content consumed outside the app) Have a web platform as wel

> Is it because they also have a web version and people can use the web version also (amounting to content consumed outside the app) Have a web platform as well, use 3rd party billing dont pay the tax. You sort of know the answer to this question. You may be looking at the wrong side of this however. After the cost of setting up a 3rd party gateway, and then dealing with currency (if your international) and then dealing with the overhead of a website or other means of consuming content the tax might not be a tax at all. You need to take a look at what "break even" is on sales for you app before you make this call.