[dns_snek]

Does Reddit do that too? Is it just on the "new" UI?

I know TikTok encodes it in an inconspicuous way, the ID in the shared URL just looks like a normal ID but it's different from the bare video ID. Then both of you (I think) get a "Do you know person xyz?" type of notification.

[inigyou]

Reddit encodes the whole thing in an opaque blob, giving you a URL like reddit.com/share/<blob> that cannot be transformed into any other format without fetching it.

[chorizo]

On a browser, you can strip the share id and post title to create a “clean” old.reddit link, with this pattern: https://old.reddit.com/r/bapcsalescanada/comments/1vd9h0j/