It is True that not everywhere, Euro is common, Countrys in South Asia has a high price of euro, 1 euro is like 70 Rupees in India, many more country's are there, So the Donation of Warmane is Pretty High, I think that the Topic is good as the person will link accounts and can sell there alt characters which secures there account with protection from other accounts. warmane will get 1 more Question for Recovery part.
About Coin Unlocking,
I dont know it can be True or false ur fact, Its true that people sometime need coins in hurry , Warmane allows to use Locked coin in Store only or There Coin consuming Services. But sometime a scammer can scam and take all Coins by Gifting if he knows that u donated or sold something freshly,