Admit loadRequest() strange leak

I have not been able to find a proper answer to this question, even though the question has been asked multiple times before.

Whenever an Admob loadRequest() is made Instruments warns that there is a leak. Like so:

If you look further into it, it appears that something called "SKPaymentQueue" is at the cause:

I tried to download Google's own Admob API demo and even the API demo has the leak! So, seemingly this is a not a problem on my part.