Possibly the number of users is even larger, if people can share a terminal. Wifi 802.11s Mesh with Batman routing scales very well to huge sizes.

This is already assuming terminal and account sharing. I meant to link this story, the original source: https://www.iranintl.com/en/202501060034. The stat is based on 30,000 unique users. I don't know how many actual terminals there are, probably a few thousand.