This is entirely dependent on your product. For example, I'm working on an alternative to Jira [0] so it was pretty easy for us to come up with a business model - subscription based per user with a free tier.<p>The only business model that doesn't really make sense to me is advertising (or any model where the user's data is the product).<p>0: <a href="https://kitemaker.co" rel="nofollow">https://kitemaker.co</a>