The most common business model is freemium, where you funnel users to become paying users of another product of yours, or users can upgrade to a more advanced p

The most common business model is freemium, where you funnel users to become paying users of another product of yours, or users can upgrade to a more advanced paid version. Then there's ads. Asking for a payment upfront for a web app will be though. You might remember demos or shareware? Think like that, you give away a free demo, if the user likes it, they will pay for more. There's one big problem though, if the freemium model doesn't work...