>> "Surely not all of them are able to generate any sustainable revenue that is long-term." This is the same with any real world, brick and mortar business. 9/

>> "Surely not all of them are able to generate any sustainable revenue that is long-term." This is the same with any real world, brick and mortar business. 9/10 small businesses fail within the first year. The chances your business or product will succeed is very small. Entrepreneurs often go through several failed businesses before they get one that succeeds. How you define success is also important. It's much easier to create a sustainable SAAS service which you can maintain yourself and pays you $50-70k per year that it is to take funding, grow to 1 billion users, and make money.