It seems the author is salty about the fact he doesn't make money from open source, but is investing a lot of time. Well my dear colleague, offer support to the bigger companies that use your software in production or use that software to sell another. Simple.
Open source was never meant to be for-profit, at least from my understanding. Something you give back to the community, because you have taken a lot from it in the first place. You dislike new issues by non-payees? Well, write better docs. Someone is also giving YOU time by submitting that issue or by finding a bug - so should you pay them money for testing? Be grateful.
Should we all pay for the open source tools/frameworks we use? I can guarantee this would cause riots. If you don't want to contribute to OSS don't, but please do not whine about it.