I'm in Qantas FF but that's about it - never bothered or don't bother with things like Fly Buys because, as it suggests below, the "rewards" of participation are typically pretty spartan
. A bit like the "spend $20 in our petrol station store and we'll give you an extra two cents discount on a litre of fuel" promotions. 
http://www.adelaidenow.com.au/news/south-australia/the-true-cost-of-that-50-loyalty-voucher/story-e6frea83-1225825263842
SHOPPERS need to spend $100 to earn less than $1 in rewards or savings in supermarket loyalty programs, a Choice study has found.
Research by the consumer advocate also shows to earn a $50 voucher, using FlyBuys and Woolworths Everyday Rewards schemes, customers must spend almost $11,000 at Woolworths and more than $15,700 at Coles.
The findings are based on Roy Morgan Research figures that show in the year to last June, the average Australian shopper spent $156 a week in supermarkets. It would take seven years to gain enough points for a Virgin Blue flight from Sydney to Melbourne using the FlyBuys system, the report claims.
Choice's Elise Davidson said many consumers were unaware data about what products they buy, when and how often, with personal information given in the sign-in up process, were in a sophisticated marketing strategy.
"With results showing returns of less than $1 for every $100 spent, a lot of the time, you have to spend a small fortune to get any benefit," she said.
Retail analyst Stirling Griff said: "This is not someone sitting in a back room having a laugh about what you've bought or doing something sinister, it's about saying: `You're a mum with three kids, here's specials that might be of interest'."
Woolworths spokesman Luke Schepen said of the two million customers who signed up for the company's Everyday Rewards program since last June, 300,000 had earned enough points for a $50 voucher.
FlyBuys general manager Phil Hawkins said the findings were misleading and inaccurate. He said Choice neglected to say that points could be accumulated across 16 businesses.
University of NSW consumer affairs expert Associate Professor Frank Zumbo urged consumers to look for checkout savings rather than waiting for a reward.
Highgate mother-of-three Tanya Simmonds, 41, has between 10 and 15 loyalty cards and believes they are valuable. "I've got a Woolworths Everyday Rewards card. I shop there anyway, so it just makes sense," she said.
Goodwood father-of-two Lee Revell said although he was yet to see any rewards from his Woolworths loyalty card, it was worth having.
"The fact that it's linked to the Qantas frequent flyers scheme is great. Hopefully one day I'll get something from it," he said.
