[ImPostingOnHN]

2) and 3) don't seem to actually apply to sneakers here:

2) I've used the app before, the fact that someone else and I both want these sneakers doesn't make our purchase of a pair each a "common enterprise".

3) I didn't expect profit, and buying a thing which can be resold for profit doesn't mean every purchase of it was an expectation. All my sneakers are worn.