I completed more than 10 episodes (not levels) between two Thursdays and have received nothing, zilch, no gold bars whatsoever, and according to the screen notification I should have received at least 50 gold bars, but they never materialised. VERY DISAPPOINTED.
Thanks for your message. I think the gold bars were offered for completed episodes, on a Thursday, but the offer has not appeared since. I now have a new offer giving gold bars if 10 (I think) episodes are completed by next Thursday. So I’ll wait and see what happens.