Quote:
"Individuals
You can also use a Personal license for commercial purposes, up to a limit of $5000. That means if you're an indie dev, you can make up to $5000 revenue from using Construct 2 (for example, by selling games or supporting them with adverts) before you need to get a Business license. Mind you, once you've made $5000, I don't think the Business license will be much of an obstacle!"
http://www.scirra.com/tutorials/57/how-construct-2-licenses-work