Not true. The app uses end to end encryption.
You can share this url with your social network like WhatsApp, Facebook, Twitter, Viber, Telegram, Instagram, Snapchat etc. You can also put your unique url in your signature or any other site. 3 referrals gave me 75 Gems which is 4000 bits and i didn't have to do much really.
Either you did not read everything, or you have no idea what you're talking about. The app relies on social networks, which compromise privacy to a great extend.
I think you are a little too paranoid. This one has end to end encryption and data won't be stored on their servers tho, i would say if you are not a criminal you don't have to worry
http://imgsrv.worldstart.net/images/ct-images/2012/01/kevin_android_app_permissions_12.jpg ; although it is probably worse for Facebook right now (too lazy to get SS). I never said that the app itself compromises privacy.
That 'if you're not a criminal..' is the worst argument. How about I put cams in your home and watch you 24/7, after all you don't have to worry since you're not a criminal?

This might be a bit off-topic (we need to stop).
Anyhow, I've already stated that the app is useful for people who have a lot of followers on various social networks. Those that don't can find better ways to earn money around here (even by just learning simple languages like HTML, CSS..).