As a result, Wikimedia found that bots account for 65 percent of the most expensive requests to its core infrastructure despite making up just 35 percent of total pageviews. This asymmetry is a key technical insight: The cost of a bot request is far higher than a human one, and it adds up fast.

https://arstechnica.com/information-technology/2025/04/ai-bots-strain-wikimedia-as-bandwidth-surges-50/