I have a question. How do you invite your friends exactly?
Let's say I share the invite on my phone (mobile facebook) and my friend clicks on the invite on his/her desktop (desktop facebook) and starts the game on facebook and later continues on his/her phone.
Is it possible and does it count to the new reward system?

I never invited anybody, so please help!

Please help , ive invited about 100 people out of which 15 of them have really started to play and they are already addicted but wheres my 75 gems?

I never got any reward so far. Its kinda disappointing after I pushed my friend so much just to play the game and it turned into a letdown. As for the records, I did this after the new social feature came out in 6.1.3

So @Fox
How should we invite friends to receive the rewards? I'm not going to invite anybody until I know for certain I can get the rewards.