Is there a reason why cell_towers.csv.gz file size has decreased so much compared to before?

Hello.
The cell_towers.csv.gz file size was previously around 5G,
In July, the size was only 103M.
Is there a reason why the file size has decreased so much compared to before?

I have the same question.
I first saw that the size had dramatically decreased some time in June. I assumed that it was part of the reported problem with the download server, but apparently not.
Could it be that we are only seeing the latest delta and not the full database?

The database exports only comprise cells seen in the last 18 months. Our team is exploring ways to make historical data available, but we don’t have a timeline for it just yet.

Thank you, that explains it.