I really like the model where tools are free for educational, open-source, and other non-commercial uses. I've ended up paying for software libraries because I

I really like the model where tools are free for educational, open-source, and other non-commercial uses. I've ended up paying for software libraries because I was first able to try them out for free in school and other personal projects. One issue with fixed pricing or licensing is that it can lock out people in developing countries from participating. A few hundred dollars is nothing for a San Francisco based company but it might be a huge amount for someone in Latin America. How many great ideas fail to take off due to insufficient access to funding? In recent years game engines have been doing an interesting job at exploring this space. You can use stuff like Unity or Unreal and the price depends on how much money you're making. I think something similar is done in the mobile app store ecosystems as well.