Tried to edit on my mobile (T-Mobile - US) and got this:
Your IP address has been blocked from editing Wikipedia.
Blocked by Xaosflux
Block will expire in 7 months
Curiosity led me to Xaosflux's Wikipedia page where I see they have been active since 2005 with over 85k edits!
I've had the desire to contribute so many times, but each time I was blocked. I don't think Wikipedia accurately measures how much contribution they lose because of the hostile treatment of new editors and what I believe are poorly implemented editing policies. Their policies likely haven't been revised since a decade or more, they should do a survey about it.