Both of mine are offline and involve something in an everyday space that others wouldn’t understand the significance of or possibly notice at all
First, the Hash House Harriers, the self-proclaimed “drinking club with a running problem”. It’s fun seeing chalk marks on pavement and knowing that a hash had recently passed by, even if it’s been some time since I’ve been.
Second, geocaching. Tons and tons of containers hidden around you that you might never see if not actively looking for it. It’s always a blast running into another person suspiciously looking about under a bench or whatever.
Previously worked for Amazon data labeling. The priority was largely having everything done in-house due to privacy concerns. It’s a lot easier to act on privacy leaks coming from within. That said, the long term strategy is using crowdsourced labeling for anything not having to do with customers or customer data. So looks like you’re both right :)