>>> Snapchat just needs to allow you find and add friends more easily. That's what's holding them back.
Not really. There is a balance which needs to be achieved. I have around > 500 friends in Facebook/Instagram but i don't really care much about what he/she shared every day.
Having lots of people makes the social media experience better in first few years but not long-term.
When I post to Snapchat, I used to get several dozen views from friends. Now I'm lucky if I get ten.
Snapchat just needs to allow you find and add friends more easily. That's what's holding them back.