I was wondering if you (itch.io) has any info to share on the number of new games uploaded every day?

I posted 3 games over 5 days. Their IDs were 99845, 100815, 101945. Assuming ids are consecutive that seems to be around 400 new games a day. Of course even if ids are consecutive some of those ids might be for games not yet uploaded. Still it would be interesting to get some stats.

I saw this older info but it seems to only include games for sale?

https://itch.io/blog/2/running-an-indie-game-store-2015

From a cursory look, the number you posted seems to be the right order of magnitude. It varies from day to day!