also reply when someone DMs these words

A DM containing any of these words gets the same reply, no comment needed.

reply to their comments under the post

One is picked at random each time, so replies don't look identical.

an opening DM

Starts an interactive conversation prompt before revealing the link.

a follow requirement first

We send the link only after they tap the button and Instagram confirms the follow. If it can't be verified, we send it anyway.

a follow-up thank-you message

Sent right after they tap through.