I have collected and crunched GBs of data for months and made it available for download for free at GitHub - beetrove/openai-gpts-data: Data about 349K OpenAI Custom GPTs
This project (BeeTrove) aims to spark community collaboration, encouraging everyone to explore, uncover insights, and enhance our collective grasp of Custom GPTs. Feel free to share your findings here.
Here is an example dashboard of insights possible with this data:
You can also check a 5% random sample in this Google Sheet (the full dataset is too big to fit in Google Sheets).