14X at github's scale is unlikely an easy problem to solve. Additionally, there is a strategic reason to be the repository for all code, free, or not which is

14X at github's scale is unlikely an easy problem to solve. Additionally, there is a strategic reason to be the repository for all code, free, or not which is likely at conflict with reliability goals. (e.g. they could get rid of their free tier which would improve reliability at the cost of allowing a new competitor to be the repository for all new AI driven code) The long term strategic benefit of being the home to all code (or most of it) is enormous. They are likely balancing that strategic goal with what is seen as short-term internally as reliability.