It could be something like hobbyist vs. professional programming. I would bet that pull requests generated as part of someone&#x27;s job are typically higher quality: they&#x27;re more thoroughly used&#x2F;tested before submission, the authors can spend more time on them, etc.  These are more likely to be submitted from &quot;work accounts&quot;, which can be deliberately vague (e.g., if shared) or just not fleshed out very well.<p>It might be possible to flesh this out by looking at the domain names.