It seems to be conflating open source software with small communities or companies that provide services running on open source software. So the example in the

It seems to be conflating open source software with small communities or companies that provide services running on open source software. So the example in the article of a small alternative social network would face the same problem whether or not it was running on open source software. It's the smallness of the business that's the problem, not the software per se.