I spotted this service that allows you to send email via sms https://www.sms2email.com/site/sms2email.php
It would cost whatever sending a sms to a UK number is, but looking around that seems to be 50c -$1 from most countries.
I'm not sure if Syed has yet set up a automated email to Wikipedia system? Or how you would monetize it, but it seems technically relatively trivial to set up. Alongside Aprs to email this seems to give a good range of options for requesting Wikipedia pages.
People without a data plan, or out of range of data could find it useful.