Too Long; Didn't Read
What's an Open-source project?
The tech world is moving according to economic trends.
There’s no company or startup which is ready to risk a lot of funds for a software project if there is a cheaper alternative.
What a company needs is to get a service up and running regardless of whether the software was built from scratch or as an open-source project.
At an individual level, open-source saves time and money too. By the way, what reward do you get after building your project from scratch?