There are three ways to get your QSL:

For direct mailers:
Please keep in your mind, that 2 USD are less than 1.30 Euro at present.
Postage from Germany to other continents than EU is 1.70 Euro.
That means, 2 USD is not enough to cover my expenses. I will find a cheaper way but you have to wait longer.
Even for EU I have to spend 6 cents from my pocket if you send only 1 USD.
And please remember: it is not MY fault !