they owe a huge part of success intially to tricking people into what you describe -- that it's a replacement/better than SMS -- that it's "free". When it was simply that ppl couldn't tell difference between SMS network and Internet. And using phone numbers as accounts got a ton of people in non-American areas to use it (also north american texting rates crazy cheap unlike alot of the whatsapp-popular countries). Ridiculous. When all it is is another internet messaging app.