"Photo apps today are about a traditional feed model — you post, and it gets pushed out. The problem with that is it does not work terribly well with shy people – and into that category fall millions of teenagers." Shy people still won't ping others. Don't see how this will solve that problem. Oh well.
Shy people will get pinged by their friends and feel like they've been invited to share. I think that's what they're getting at, not positive.
Yeah, it's flattering and would make me want to take a picture to oblige. Very clever.