WhatsApp may be popular, but Facebook doesn’t make any money from it, mainly because it’s a standard messaging app and nothing else. Facebook Messenger, on the other hand, has the potential to make tons of money because it emulates billion dollar Asian messaging apps like Line and WeChat. Not only does it allow users to buy stickers and use third-party services from within the app, TechCrunch acquired some leaked Facebook documents on Thursday, which suggest that the company is planning to add advertisements to Messenger in the near future.