Coming from Closed Source to Open Source.

Dilbert

   In Closed Source software you have a set price for your software to pay the bills that come from the life of both the company and the people who work there. With that set price comes the almost promised income that is needed for continued development. While of course Open Source software is still made by real life people but it's not always their day to day jobs to do so. 

   Most developers of Open Source software do the coding in their free time away from their real job, wife/husband, kids, pets. These annoyances cause the way to gain funds to continue development. The most common is crowdfunding using websites like kickstarter and indiegogo. There also have been mixed results with donations on a monthly basis. It varies based on the the need and demand for the software in question.

   The funding is not the only problem in question, how safe is the code if everyone in the world with a Internet connection can edit it. With the Closed Source model you can be pretty sure the problems could come from human error, but with Open Source it could be just someone who wants to cause terror to the people who use the code if someone did not notice the change.