For what it's worth, when I encounter a project doing this I treat it as a giant red flag that the developers don't care about the quality of their project.

In the majority of cases, there's another project that I can move to and I do so as soon as possible.

There are presumably others like me. So when you say it's sustainable, you may not be accounting for the reputational damage it does to your project, which you will almost certainly never be made explicitly aware of because users know it's not worth their time to file bugs.