You see the term "AdSense UPS club" mentioned throughout various Google AdSense help threads - but what does it mean?
For publishers who earn a lot of money with Adsense, Google will overnight a check to them normally through UPS. Although in the earlier days, Google overnighted those checks using FedEx.
There are rumors you need to earn over $25,000 per month to make the club. But I believe it is closer to $10,000 per month to make the Google AdSense UPS Club.
$10,000 checks are valuable enough that Google feels they should overnight them via signature delivery via UPS service.
One publisher just said he made the club after working at it for several years. You can read about it at WebmasterWorld forums where he said:
I'm definitely dating myself, but years ago when I first started working with Google Adsense I promised myself that once we joined the "Google Adsense UPS Club" that I would post to WebmasterWorld.
Forum discussion at WebmasterWorld.