Hi pcrdude,
Since the shipping is free, why would anybody want to stock-up without trying first? Honestly, half this forum is about things not working or not working well. I made that mistake almost a year ago, my first 5 pack of clearomizers and not a one could hold liquid.
Maybe habit of consolidating orders where shipping isn't free? Maybe trusting the experiences of other ECF-ers? Maybe wanting to stock up to avoid waiting for stuff in the future?
Take your pick, suggest another , or call me crazy.