Taxonomy of Signaling

Signaling can be broken down into different components, explained through the act of buying some expensive snickers: 

1. Signal Message: "Look at my $100 shoes"
2. Signal Distribution: wearing the shoes
3. Signal Amplification: post your outfit on social media ... ideally with an inspiring quote. 

Physical products have signaling distribution built in. Apps live on your phone or computer. No one can see them except for you.

That's why some apps like Superhuman add a signature at the end of every email, or apps like Revolut send you a physical premium card.