I dunno....I guess it depends on how you define "slow". We've bought almost nothing from their shopping mall in the last few years, with the big exception being the Starbucks GC promotion they ran earlier this year ($10=500 points). Basically we just click on the five-pointers, answer the surveys, and do a very quick pass at the searchbar at the beginning of each month. Yet we've each managed to earn 5,000 United miles for each of the last two years. That might not be anything that would make a road warrior sit up and take notice, but I see it as an easy way to keep topping off the account at virtually no cost, and with minimal effort.