Hello,
as we know, there was also a thread about this topic on airliners.de. A member from that board also wrote to the STC-Staff, and became an amazing answer last friday...:
Die 2 verschiedenen Informationen kamen zustande, da sich die Gültigkeit der Promotion geändert hat. Ursprünglich war die Promotion nur Gültig für Mitglieder mit schweizer Wohnsitz. Somit waren nur die Flüge von der Schweiz und wieder zurück Meilenberechtigt (also maximal 2 x 10.000 Meilen pro Flugstrecke). Inzwischen wurde die Promotion auf alle Mitglieder erweitert.
(The rules of the promotion changed: Initially the promo was valid only for CH-residents, but in the meantime it was extended to all members).
Uhps, I think it was indeed planned just for CH-Residents, but due to the unfortunate formulation of the small print and all the responses from the customers they had to extend it...
I just booked a mileage run - but spend a little bit more money as I love to fly with real airplanes (A319 onward-my usual transportation is on ex-Crossair-toys...

).
Here my itinerary (I never fly back with the same plane as I arrive):
May 14th MUC-ZRH-LHR-ZRH
May 15th ZRH-VIE (Overnight hotel)
May 16th VIE-ZRH-LHR-ZRH
May 17th ZRH-MUC
May 21st MUC-ZRH-LHR-ZRH
May 22nd ZRH-LHR-ZRH
May 23rd ZRH-MUC
Totally 158'200 miles for 827 EUR
+MUC-ZRH-BEG-ZRH-MUC and 3x MUC-ZRH-MUC in April.
Hope I will meet somebody on board or on the Lounge!
Greetings Patrick