We need to normalize the idea that if a company uses something open source they automatically get someone to contribute to the project. That couple be hiring people in house to maintain it, it could be paying a consultant, it could be donating to a charity that maintains it. Probably some other way as well. However if you are a company getting value from open source you really need to put some money into keeping it maintained.

The above applies to private people as well. You use how many different pieces of software, what are you doing to ensure they stay maintained. (if you are like most nothing...)