Say you have ‘a few’ stars (like, say 9k+), then the generated README violates some limits GitHub sets on handling / rendering large documents. See jhermann/observatory for my manual solution.
The numbers:
464K README-AtoO.md
4.0K README.md
588K README-PtoZ.md
1.1M total
Another option would be to sort by stars and/or last commit date, and then limit the number of entries, only keeping the top N ones.