That's the first time I have ever been part of a 1%!  Thanks :) 

To answer your question about the percentage of people who are poor in terms of access to internet and devices. Lots! 

This is the percentage of population by country who use the internet. I read that as the % of people who can afford a device and the fee to get online. https://data.worldbank.org/indicator/IT.NET.USER.ZS?locations=A9 

Globally about half of homes have a PC. Phones are the main access point online now, though, but the developing world doesn't have 82% smartphone use like in the US or Europe. https://www.statista.com/statistics/539395/smartphone-penetration-worldwide-by-country/

Obviously  Nostr devs aren't responsible for whether people can afford to have an internet connection, but some apps are clearly caught up in the  built-in obsolesence trend. What are considered "throwaway PCs and devices" that could be affordable to millions of people, won't run browsers that are required to access a cross section of Nostr apps.  

If a guy can write software to pay for groceries in Africa with bitcoin on a dumb phone, it can't be beyond the wit of a community that wants to be global, to make sure its apps and clients are visible on old browsers.