That's a rather wild insinuation of the "Dear GitHub" authors' motivation. If your constructive feedback is ignored you have to start a public discussion to get the thing rolling again. That's not necessarily as selfish as you imply. There are a lot of people who would benefit from the addressed issues being resolved.
> I own you no shit
GitHub might owe them nothing, but it's in their own interest to address and resolve those issues and not just stash them away somewhere. Their biggest selling point is the great UI and the userbase. If the later becomes frustrated because issues with the former don't get resolved, that might be a huge problem for GitHub in the future. Today, there are viable alternatives after all.
> I own you no shit
GitHub might owe them nothing, but it's in their own interest to address and resolve those issues and not just stash them away somewhere. Their biggest selling point is the great UI and the userbase. If the later becomes frustrated because issues with the former don't get resolved, that might be a huge problem for GitHub in the future. Today, there are viable alternatives after all.