@Menestra

it is not a bug, It is like a wheel of fortune, you got lower discount while other one got higher discount.

Keep your fingers crossed and someday you will get a high up discount as well.

Menestra said:

I have that promotion actually

http://image.prntscr.com/image/f1c9aa99bb3b4a58bdc4468c15986e82.png

But someone else have this promotion

http://image.prntscr.com/image/5a4c0513ef554748a6bd017ed483efee.png

The question is it a bug ?

And why I have to pay 4x for the same amount of emerald ?

Thank you for any one who can explain to me :)

if you spend on the 9,99 offers you never get those back, 

if you spend on the 19,99 offers you have to wait a month to get those back, until then you only get the 49,.. offers, then if you spend on that offer >

You will only get those from that moment on plus the  99,.. offers from that moment on.
So at that point you will Never get the 19,99 ones back (unless being lucky once in a month or so for only 1 time offers).

That's just how they think they can make more money on this game.. its a roulette game accept it 

As soon as you spend more than 1 time on a 19,.. offer your hooked up on 49,.. offers for the rest of your game life  there is no turning back.

there is a reset time for offers, i think couple of weeks or a month than you can have smaller offers back again.

it is true if you buy 2 * 9.9 it will vanish and same for $19.9