CH1
The Artist Formerly Known as chiggins.
Yeah, the app records contacts, so just downloading and entering the code won't help.
1M+ downloads or so isn't bad, but as you mention, that's still a pretty tiny segment of the population. And I still haven't fully figured out how the whole "restaurants take your name and number" system works - it really feels like they should be on the same app/system too. But without looking like a SE Asian country, it's hard to mandate everyone downloading an app and forcing people to walk around with their bluetooth connections on.
It feels like theatre tbh. You just give a name and number (no verification) and then what? if one person at restaurant X( out of thousands over a span of a month) goes on to test positive, will they be contacting every restaurant they frequented?