Hey there @p0o, thank you first foe putting your time into all of this. Without people like you this whole project wouldn't work at all.
Regarding your Question I'd love to see a chat application like whatsapp or similar, in which you might e.g. get rewards for upvoting pictures of your friends. To make every single message a post would be a bit much probably.
Further something like Snapchat would be great, in which you can upvote the snaps of your friends :)
Your welcome and thank you very much for sharing your thoughts :-)