Fixing a simple bug in your own software is an order of magnitude faster than doing it in someone else's codebase. Make no mistake, it would be cheaper for them

Fixing a simple bug in your own software is an order of magnitude faster than doing it in someone else's codebase. Make no mistake, it would be cheaper for them to fix it themselves than guide someone else through a paired-programming exercise. This isn't unpaid labor, it's more expensive labor.