[ivl]

> What does the s=20 do?

Seems to be tacked on by Twitter to track the source of shares. Pretty sure the number changes by device.

[mcpherrinm]

s=20 is shared from mobile website (iOS and android tested). 21 is iOS app. Don't have others to test offhand.

There's a Twitter thread from a few years ago where a few folk collected a bunch of them, but I can't find it anymore.