It is really weird to me that Reddit could be a money making venture at all. They can't get enough money from ads or awards to actually break even. So that leaves selling user data. Ads might make more money for them if they could tailor them more to each community. I get that they want to be profitable but it seems they are really going about it in a backwards way considering all their content is from unpaid volunteers.
Costco is a weird sub anyway. I often picture the redditors there as obese folks trading tips on how to freeze massive key lime pies.