It explains right in the tweet. Big companies take unpaid work and start to rely on it without giving anything back, then demand fixes as high priority. Also,

It explains right in the tweet. Big companies take unpaid work and start to rely on it without giving anything back, then demand fixes as high priority. Also, being unpaid implies that one has to do other things to get money, so that leaves limited time and energy to put towards the free project. So when pressure starts coming in from outside, the maintainer(s) don’t have time for real reviews and accept code without fully vetting it. If maintaining this code was part of a paid day job, there would be more time, energy, and incentive to review it more completely.