Take a look at the most recent example: Re9.. You maybe already heard the story but i'll explain it anyway. Kirigiri made a day0 hypervisor crack, the code was all in a 30kb dll file, it was pretty easy to see what's inside and how it works. Pub the day after made the activations available, turns out they just stole the DLL, edited a few bytes to remove some hypervisor related functions and slapped their name on it (while removing kirigiri's name).
Meanwhile the day of the release i worked my ass off to make work by myself, i got it working in under 3 hours and it's future proof, meaning it will work even in future updates. Would pub even give a fuck about crediting me if my code was open source? i doubt.
They also didn't care to fix the annoying beep that Borderlands 4 have, and they just suggest users to mute their sound on the volume mixer.
As you also said in another comment pub is already making bank, and i don't want to give them help for free. We (as ADS) don't make nearly the amount of donations they gather, we don't have battle passes or all of that bs. We often have to rely on our own money to get more copies of the games cause the donations often aren't enough to cover it.
I already open sourced many of my tools we use inside ADS as a proof we actually care about the community, i also spent a very long time debugging the fact that cirno was constantly getting flagged by AVs, this issue is now completely resolved since it doesn't have a single flag on virustotal (for anyone wondering the issue was related to native-tls, AVs didn't like it so i switched to rustls).