Yeah, i just minimized spending on this game as it is total rip off for European players.
Worst thing is that i got stucked with my castle level 40 in Chinese realm (now merged).
I understand that McDonalds sets prices based on GDP, but in a game where players from different regions play in same realm this makes no sense. As European player i just stopped spending money because i could not compete with Chinese players.
I know in-game prices are different in different countries but I believe there is something else at play here and that is what the OP is about. I believe it is addressing the ability to purchase Linari from 3rd parties at prices well under in-game store prices, in some cases, significantly below in-game prices.
I think this has been around for a while in mobile gaming and I've heard it referred to as side-loading, but I could be wrong as I'm not expert.
For perspective, support was recently sent a screen shot of an account with over 12 million Linari, which is just what that player had on hand at the time. This much Linari would cost somewhere in the area of 160,000 USD to purchase legitimately in the store. Support didn't seem to care.